a**********e 发帖数: 418 | 1 Start With distilled THF as Solvent, Do not use hexanes, lithium halogen
exchange should be done at -78 degree over 30 min. Then add dibromohexane
in THF dropwise at -78, and subsequent warming to rt.
Both Lithium halogen exchange and SN2 reaction (in this case) work better in
a polar solvent. There is no point of using hexanes. Do not use TMEDA which
might result in a deprotonation at the 5 position.
Side reactions: 1. elemination to form 5-bromopenta-1-ene. It is difficult
to avoid 2. dimer |
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w****r 发帖数: 1384 | 2 感觉前大灯不亮了
想买亮点的灯泡,不知道能不能直接把标准的卤素(halogen)灯泡换成氙气(Xenon)灯泡
还有一个HID好像是要改装电路系统吧,网上看到这么有的地方说氙气灯泡就是HID灯泡系
统的 |
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m*b 发帖数: 100 | 4 装tracking light,目的主要是照明,还可看书。在墙上或棚上。大部分是
fluorescence的,但太暗了,想要亮一些的。LED和halogen哪种好?另外有推荐的吗?
想要3~4灯泡的那种。
看了一下,好像lowes的选择更多? |
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F***Q 发帖数: 6599 | 5
我家大多是halogen的,LED的肯定会省电,但现在功率大一点的价格都比较贵。 |
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m*b 发帖数: 100 | 6 LED的贵一些,不过亮度不错。不知道从发热的角度说,会不会像halogen一样会很烤人。 |
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p*p 发帖数: 492 | 8 我家那3个宜家的灯已经搁置半年了,大家都怎么处理ikea halogen bulb light的呢? |
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f****i 发帖数: 20252 | 12 你这是halogen,不是compact fluorescent light
把灯换了吧 |
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m***n 发帖数: 70 | 13 最近不得不做些有机合成实验。没什么经验,只能跟着文献做,但往往做的不好。尤其
现在的这个lithium-halogen exchange反应一直做不好。文献步骤如下:
Synthesis of 3-(6-bromohexyl) thiophene:
3-bromothiophene (10.2 g, 0.0626 mol) was dissolved in dried hexane (80 mL),
and the solution was cooled to -78 C. 25ML of 2.5 M n-BuLi hexane solution
was then added dropwise, and the solution was stirred at this temperature
for 10 min. Dry THF (7 mL) was then added dropwise until the white 3-
lithiothiophene salt precipitated. The solution was then stirred for 1 h,
then |
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w*******y 发帖数: 60932 | 14 Just got back from my local home depot (south florida). They had two big
displays of 50W indoor MR16 Halogen bulbs marked "special buy" 97 cents
each. Its the last item on the reciept.
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w*******y 发帖数: 60932 | 15 Rosewill R-HCO-11001 Halogen Convection Oven $59.99 - $28 coupon code
EMCNJHD68
Link: Link:
http://www.newegg.com/Product/Product.aspx?Item=N82E16896268036
Ends 2/1/2012.
Back in stock at reduced price. Just in time for the Superbowl. It was in
stock at $49.99 a week ago. Went up to $59.99 a couple days ago, and now the
coupon is back.
Elegible for Shoprunner Free 2 Day shipping or free 3 day UPS for everyone
else. Log into your NewEgg account to apply the coupon code.
I been following this beca... 阅读全帖 |
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g******y 发帖数: 2517 | 17 Designers Edge L-14 1000-Watt Twin-Head Adjustable Work Light with
Telescoping Tripod Stand, Halogen, 68% Off
http://amzn.to/xRnoOf |
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g******y 发帖数: 2517 | 18 亚马逊Deal of the Day: GE Nighthawk Platinum Halogen Headlight Bulbs, 81%
Off
http://amzn.to/HQPyFn |
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w******i 发帖数: 727 | 19 事实上对于Corolla来说, LED比HID便宜. 为啥呢? 其实很简单,用HID的需要重新设计
大灯总成,因为HID灯泡的形状比较长,发光部位和Halogen的不太一样,如果继续使用
Halogen的总成的话,会造成low beam晃眼的问题. 所以了解德系车的都知道,就算是同
一款车通常都有2种不同的大灯总成,一种给Halogen用的,一种给HID用的.
而LED就不存在这个问题,由于LED比较小,可以随意做成几乎任何形状,所以可以沿用
Halogen的大灯总成不需要重新设计.而LED有多贵呢?其实多数用halogen的大灯都可以
retrofit成led的,一套灯泡大概100-200刀就可以搞到,这并不比HID conversion kit
贵,甚至一些高级的Halogen灯泡都接近这个价钱。而如果算上重新设计大灯总成的
cost,用LED绝对比HID要便宜。
那么,下一个问题,既然LED这么好,为什么德系高档车都不用呢?首先,LED不够亮。
至少现阶段来说,LED还不如halogen的灯泡亮。事实上如果你们去一些老美论坛看看,
就不难发现,2014款开始用LED的Coroll... 阅读全帖 |
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f*********g 发帖数: 3319 | 20 实物照
1/Halogen® 'Work' Leather Shopper $ 57这个包够大,适合上班用,可背可挎
Utilitarian style defines a strappy shopper crafted from polished leather and secured with a brushed-metal twist-lock at the flap closure.
Exterior magnetic-flap pocket.
Interior zip, wall and cell phone pockets.
Protective metal feet.
Leather.By Halogen®; imported
2/Halogen® Leather Satchel $50这个要小一点,可以crossbody,也可手提。大小适中。价格白菜,质量不错的说。
Strappy satchel with a vintage aesthetic is crafted from soft leather and elevated with t... 阅读全帖 |
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d*******s 发帖数: 15155 | 21 你的型号,说是今年春季上市。
NEWLY LAUNCHED SYLVANIA SILVERSTAR® ZXE PRODUCT LINE EXPLODES ONTO THE
SCENE
Strong Sales and Positive Customer Feedback Drive Demand for New Part
Numbers
AAPEX, Las Vegas, Nov. 1, 2011 – SilverStar® zXe headlights – the
latest addition to SYLVANIA Automotive Lighting’s High Performance Series
headlight line – are taking the industry by storm.
Due to early sales success and tremendous customer feedback, the SYLVANIA
team is announcing that they are almost doubling the pr... 阅读全帖 |
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r*****g 发帖数: 9999 | 22 最简单的DIY了,比上次给passat换灯泡还容易,因为prius的车灯比passat的容易
access得多。具体步骤不多说了,在youtube上有非常详细的录像,
http://youtu.be/yxx8wvnuVCY
唯一需要的工具就是一把10mm套筒扳手。相对于youtube上的录像,我的12年的prius更
简单些,因为coolant的罐子只要拆两个螺丝就可以拿下来。当然网上也有手小的牛人
不拆也装上了。
我的HID kit是从xenonsupply.com买的,他家的是比较贵的,最便宜的,也是最常见到
的是DDM的hid kit,一套两个ballasts, 两个灯泡才40刀,我买的是slim can-bus
ballasts + capacitor + 2 xenon bulbs一共一百多点,灯泡号称是飞利浦的,但拿到
后发现根本无迹可寻因为灯泡上没有任何字样。从他们家买的最主要的原因是因为他家
提供5年warranty,号称坏了的话不用把东西寄回去,提供一张把坏了的产品销毁的照
片他们就把新的给寄来了。
这是kit的包装。
注意上面写的off road use only,... 阅读全帖 |
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y****0 发帖数: 821 | 23 I live just outside of Syracuse NY. Even by a major city and being 2010,
HID's are still rare. I wanted a set for my 04 Mercury Mountaineer and
didnt know what their legalities were. I hit the forums and got a mass
of conflicting statements so i actually called a few places myself. I
first called my local state police station and asked to talk to the
officer who handles the traffic infractions. I asked him if HID's were
illegal in halogen light vehicles. His initial reply was they do pull
over d... 阅读全帖 |
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V****r 发帖数: 925 | 24 最近路上看到不少2016 GLC,各个都是挺着俩黄色大腕灯(连透镜都不舍得装一个),
伟哥很诧异,于是去奔驰家官网看了看。
真是不看不知道,一看吓一跳!
除非额外选配$1500的Lighting Package, 2016奔驰GLC标配的竟然是早已被大部分车厂
淘汰的最廉价的反射型卤素大腕灯 (Reflector Housing + Halogen)。 就算GLC是仅比
GLA高一级别的中下级车型,但这款动不动50K出门价的最新款奔驰SUV竟然连个透镜都不
舍得上,可见奔驰拧毛巾的功夫真是了得。
而且据伟哥了解,目前在Dealer销售的GLC中95%都没有Lighting Package,想要
Lighting Package必须要下Factory Order并全额支付MSRP。
再来看看2016奔驰GLE吧,这款基于上代ML350整容而来的车型,作为奔驰SUV家族里销
量第一的最新旗舰产品,竟然与GLC一样仅仅标配卤素车灯(H7 Halogen Bulb for both
low beam & high beam)。。。不过这辆平均出门价60K的奔驰SUV的low beam总算是有
... 阅读全帖 |
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V****r 发帖数: 925 | 25 最近路上看到不少2016 GLC,各个都是挺着俩黄色大碗灯(连透镜都不舍得装一个),
伟哥很诧异,于是去奔驰家官网看了看。
真是不看不知道,一看吓一跳!
除非额外选配$1500的Lighting Package, 2016奔驰GLC标配的竟然是早已被大部分车厂
淘汰的最廉价的反射型卤素大碗灯 (Reflector Housing + Halogen)。 就算GLC是仅比
GLA高一级别的中下级车型,但这款动不动50K出门价的最新款奔驰SUV竟然连个透镜都不
舍得上,可见奔驰拧毛巾的功夫真是了得。
而且据伟哥了解,目前在Dealer销售的GLC中95%都没有Lighting Package,想要
Lighting Package必须要下Factory Order并全额支付MSRP。
再来看看2016奔驰GLE吧,这款基于上代ML350整容而来的车型,作为奔驰SUV家族里销
量第一的最新旗舰产品,竟然与GLC一样仅仅标配卤素车灯(H7 Halogen Bulb for both
low beam & high beam)。。。不过这辆平均出门价60K的奔驰SUV的low beam总算是有
... 阅读全帖 |
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e******g 发帖数: 5344 | 26 HID比起halogen还是有本质区别的,我开完奥迪带HID再开halogen的感觉跟没开灯一样
。晃对方主要是cut off line的问题,路上最多的就是各种fart can civic, 不光屁响
,头灯也对天照。如果是原厂的一般不会晃人。不过我觉得新烤肉应该是设计问题,我
也被晃好几次了。奔驰标配halogen有点不厚道,起码应该学宝马,328是halogen, 340
就HID啊 |
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n****o 发帖数: 14771 | 27 ☆─────────────────────────────────────☆
myism (nk) 于 (Fri Jun 8 14:59:07 2012, 美东) 提到:
鞋子比较多 一楼先推荐blog免得之后忘记了
http://www.mutex.me
它们追踪这些大牌在各大网站(主要saks之类的department store)打折的情况
http://mutex.me/designers
都是我的大爱阿
特别适合不想一个网站一个网站去找deal的懒人
慎入阿 大家点进去之后 可能就忍不住花钱了
我不幸就是如此 T___T 看到了一些本来没看到的deal
于是又多了几双正在路上的鞋子 这些鞋子赶不上入镜了
不过这几天还是天天泡在上面追deal (好多都是他们刚贴的时候deal还在 几分钟就没
了-_- 秒gone阿)
--------------------------------------------------
好了 推荐完了
先奔个这半年来买的鞋子的集体照
晚上灯光昏暗 偷懒用手机拍的
大家将就着看
分两批
louboutin + others
btw..... 阅读全帖 |
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G******U 发帖数: 4211 | 28 Properties of Hydrogen
Hydrogen is a nonmetal. It is placed above group in the periodic table
because it has ns1 electron configuration like the alkali metals. However,
it varies greatly from the alkali metals as it forms cations (H+) more
reluctantly than the other alkali metals. Hydrogen‘s ionization energy is
1312 kJ/mol, while lithium (the alkali metal with the highest ionization
energy) has an ionization energy of 520 kJ/mol.
Because hydrogen is a nonmetal and forms H- (hydride anions), ... 阅读全帖 |
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l*****c 发帖数: 316 | 29 原来的车灯太暗了,想换个新的。发现网上有
LED, LED halogen , 还是 halogen 的
哪个比较好呢
还有人跟我推荐用silver light 的灯泡,好像是halogen的,这个怎么样啊
多谢 |
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e******g 发帖数: 5344 | 30 一般来说看色温。。白色是HID, 偏黄的肯定是halogen。HID贵的原因是持久,寿命一
般是halogen的好几倍,而且工作温度低,关来开去的对寿命也没影响。halogen如果总
是关来开去的,灯丝很容易烧 |
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l*n 发帖数: 2590 | 31 发出光谱图以后,看来有不少同学也想试试。
我想说明一下Halogen Light的使用安全:
在一般情况下,Work Light是很安全的。几乎没有发生过什么work light引发的火灾。
但是每年都有数以千记因为不正确使用而造成的意外烫伤。
1. Halogen灯泡的表面温度可以高达900华氏度(500摄氏度)。皮肤接触的瞬间就可能
烫伤。所以work light都有一块UV filter玻璃保护,千万不要把玻璃去掉。
2. 小孩子可能会有好奇感,不要让小孩子单独接触这种灯。我就打算放在地下室
utility room里。
3. 爱美的女同学,如果要在Halogen灯下长时间做农活,建议涂一些UV Block。即使有
了UV Filter玻璃,还是会有一些紫外线辐射的。但是对于植物来说,这些有限的紫外
线恰恰是最好的杀菌方法。 |
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b**********g 发帖数: 534 | 32 不太明白你说的没有Hi是什么意思,是没有HID还是没有单独的远光.
如果没有HID你想换xenon,必须整个总成都换,
因为HID的reflection pattern跟halogen不同,需要用projector聚光和确保cutoff,
如果HID放在普通reflector里,光散射太多会影响对面来车.
HID需要ballast,但是实际上功耗一般是普通halogen的一半.上面有个帖子提
到了.
闪HID对其寿命影响很大,所以早期HID通常都是近光,远光用单独的halogen,
后来有了bi-xenon,就靠改变projector里面的cutoff来换远近光.
另外这个东西肯定是一份价钱一份货,那些便宜的灯泡基本属于浪费.
不想换头等总成的可以考虑一下HIR,东芝产的一种灯泡,
据说不错,仅ebay有售. |
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w*******y 发帖数: 60932 | 33 Good Morning (TM) Sunrise Wake-up Light Alarm Clock with Nature Sounds (with
Halogen Light Bulb)
List Price: $149.00
Price: $99.00
Sale: $36.00 & this item ships for FREE with Super Saver Shipping
Product Features
* 7 Built in Soothing Nature Sounds-Birds Chirping;Water Flow; Forest
Sounds;Night Sounds;Crashing Ocean Waves; Tower Bells and Chimes;Thundering
Clouds
* Gradual Increase in light over 15 minutes before alarm
* Gradual increase in alarm sound over 90 seconds
*... 阅读全帖 |
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d**z 发帖数: 3577 | 34
Gallstones
In addition to the prevention of kidney stones there is evidence that
magnesium can prevent gallstones. Our medical dictionary says that the
gallstone is a concretion formed in the bladder or the biliary ducts,
composed, in varying amounts, of cholesterol, bilirubin, and other elements
found in bile. The biliary ducts are in the liver. In this case also,
magnesium is a specific preventive factor in the formation of gall- or liver
stones. For one thing, in a previous chapter, we showe... 阅读全帖 |
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a*****y 发帖数: 405 | 35 配置我是在滴乐网上找的,贴在下面,有点长哈
我之前有发帖问过大家的建议,然后我看了一下,空调确实是有的,radio我当时还真没太注
意,主要一看有空调,我就心里踏实了好多 :))))) 不过从网页上看标配里面说这个AM/FM
是-inc,是不是就说不包括
STANDARD EQUIPMENT
Exterior
15" steel wheels w/full covers
P195/65HR15 all-season tires
Compact spare tire & wheel
Body-colored bumpers
Multi-reflector halogen headlights
2-speed intermittent windshield wipers
Chrome rear license plate trim
Interior
160-watt AM/FM stereo w/CD player -inc: (4) speakers, MP3/WMA playback,
auxiliary
input jack, speed-sensitive volume cont... 阅读全帖 |
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a******a 发帖数: 75 | 36 发信人: halogen (halogen), 信区: Automobile
标 题: 请教大家一些打蜡的问题? 多谢多谢
发信站: BBS 未名空间站 (Wed Sep 14 18:27:57 2011, 美东)
新车到手有段时间了,最近想洗洗车,有些东西不是很了解,想向大家请教一下。
1。这边的新车需要开蜡吗?国内的新车好象都需要哈。如果开蜡是不是用car wash
liquid洗洗就就行, 还是得买特殊的溶剂?
2。网上查了一下,好象说新车头半年都不用打蜡,是这样的吗?
2。车是银色,买了下面的车蜡。后来发现上面写着 "Hides light scratches&swirl
marks"。看版上有人买了有研磨的车蜡,用了车反而更花了。拜托大家帮我看一下。这
个turtle wax ice 不会是有研磨功能的把?有谁用过吗?
http://www.amazon.com/dp/B003H18G8C/ref=asc_df_B003H18G8C170536
多谢多谢! |
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k***g 发帖数: 4904 | 37 听这个意思,基本就是源于光通量比Halogen高很多吧,也就是说其实原来的Halogen一
样会晃前面和对面的车,只不过是光没那么亮而已。反正我觉得对面有车的时候始终都
是狠晃的,根本看不清路,那些车总不能都开的远光吧 |
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p*****p 发帖数: 19331 | 38 2012 328i Sedan Standard Features
Performance and efficiency
•
2.0-liter, dual overhead cam (DOHC), 16-valve, 240-horsepower inline 4-
cylinder engine with aluminum engine block, TwinPower Turbo technology, High
Precision Direct Injection, Valvetronic, and Double-VANOS steplessly
variable valve timing
•
Electronic throttle control
•
Auto Start-Stop function
•
Direct ignition system with knock control
•
Electronically controlled engine cooling (map cooling)
•... 阅读全帖 |
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p******3 发帖数: 73 | 39 用新车stock xenon跟旧车的stock halogen比。是不是halogen偏黄,所以感觉亮? |
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r*****g 发帖数: 9999 | 40 你是啥车?我发现honda的车灯都特别暗,感觉路上开远光灯的很多都是honda。如果是
projector lens的话去换个hid,不是的话就换个更亮的halogen bulb,不过一般越亮
的halogen bulb寿命就越短。 |
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z*********o 发帖数: 1091 | 41 比如看到有 SYLVANIA 9006 XtraVision Halogen Headlight Bulb, (Pack of 2)Sep
21, 2012
by Sylvania
$13.92
Philips 9006 Standard Halogen Replacement Bulb, (Pack of 1)
by Philips
$7.90
该买哪种? |
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e******g 发帖数: 5344 | 42 把led换成halogen了。美国产的价格涨了货还次了。。估计是看大部分人反正是lease
,halogen开三年也坏不了,就把这块的成本砍掉了。 |
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V****r 发帖数: 925 | 43 成本:
Reflector + Halogen(2016 C300/2016 CLA/2016 GLA/2015 GLK/2016 GLC标配) <
Projector + Halogen(2015 Camry标配) < Projector + Xenon (2016 RX350标配)<
Projector + LED (2015 Corrola标配)< Jewel Eye LED (2016 Acura全系标配,
2016 RX350选配,德车没有) |
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e******g 发帖数: 5344 | 44 mb的灯确实不厚道,标配都是halogen加上reflector。
宝马除了很底层的trim,都是HID标配,就算是底层的,也是halogen加上projecter。
奥迪全线标配HID。 |
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e******g 发帖数: 5344 | 45 因为从halogen projector换到hid projector比固定个ballast麻烦多了。你连ballast
固定都要问,肯定没改projector。
anyway,就算改了projector也还是没有self leveling,在起伏比较大的地方开难免不
会闪瞎对面车。安全性其实还不如原厂的halogen。 |
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n***s 发帖数: 10056 | 46
I replaced my low beams with XenonDepot Extreme HIDs. Super bright. Also
replaced high beams with XD Extreme LED Pro bulbs. Not as bright as HID but
much better than Halogen bulbs (HID has warm up time and is not suitable for
high beams).
Strongly suggest you do the same.
Every halogen headlight is same regardless car type: dim (IIHS rating: poor)
. |
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b********6 发帖数: 35437 | 47 我最烦那种自己改灯的。对面过来简直亮瞎狗眼
全程开high beam 是可以给罚单的,但是安装不合格灯泡的却没有罚单,这个法规应该
改一下
[在 noles (mileman) 的大作中提到:]
:I replaced my low beams with XenonDepot Extreme HIDs. Super bright. Also
:replaced high beams with XD Extreme LED Pro bulbs. Not as bright as HID but
much better than Halogen bulbs (HID has warm up time and is not suitable
for high beams).
:Strongly suggest you do the same.
:Every halogen headlight is same regardless car type: dim (IIHS rating: poor)
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y********1 发帖数: 22 | 48 因毕业回国,出售几乎全新(购于2011年7月)黑色大众2011款运动型轿车cc,2200
miles
以下是从CARFAX导出的车辆信息:
Black
2,200 Miles
Excellent reliability & safety ratings
Leather Interior
Heated seats and Rear-view mirrors
Sirius-XM Ready
VW Issue All-Weather Floor Mats as well as carpet mats
Large trunk with rubber mat protector
One-touch automatic Windows
Full spare
No Accidents
Clean Carfax Report
Single Owner
Full features as below:
(3) Aux Pwr Outlets
(4) Cupholders
(8) Speakers
17" "Phoenix" Alloy Wheels -Inc: Anti-Theft Wheel Locks... 阅读全帖 |
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l******i 发帖数: 2284 | 49 41R0625 55Y3713 2GB DDR3 1067 LOW HALOGEN YES
41R0625 55Y3713 2GB DDR3 1067 LOW HALOGEN YES
42T0635 42T0636 14.1 INCH LCD DISPLAY FRU YES
42T1324 42T1325 USATA B120 TOS YES
42T2598 42T2599 SBS9 RAMBO6 PC YES
42T4691 0000000 PANASONIC 6 CELL BATTERY:RECHARGEABLE BA NO
42W8177 45M2371 FRU PALMREST ASM W |
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y********1 发帖数: 22 | 50 因毕业回国,出售几乎全新(购于2011年7月)黑色大众2011款运动型轿车cc,2200 miles
具体情况如下:
Black
2,200 Miles
Excellent reliability & safety ratings
Leather Interior
Heated seats and Rear-view mirrors
Sirius-XM Ready
VW Issue All-Weather Floor Mats as well as carpet mats
Large trunk with rubber mat protector
One-touch automatic Windows
Full spare
No Accidents
Clean Carfax Report
Single Owner
Full features as below:
(3) Aux Pwr Outlets
(4) Cupholders
(8) Speakers
17" "Phoenix" Alloy Wheels -Inc: Anti-Theft Wheel Locks
3-Spoke Le... 阅读全帖 |
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