想起来了,你要的是这个
Campbell Hausfeld MP6000、 11刀 http://www.amazon.com/gp/product/B0007ZJ1IK/ref=as_li_qf_sp_asi
#1 Best Seller in Air-Compressor Accessories
、
(我查过类似的型号506,在评论里面看到有人推荐这个)
这个是可以一边打气一边看读数的(with a clip to the valve)
The chuck on the Campbell Hausfeld MP6000 clipped onto the
valve stem, which I found convenient.
The Milton's pressure gauge is tiny, making readings less accurate compared
to the Campbell Hausfeld MP6000 Tire Inflator with Gauge.
Milton S506 Dual Head要卖30刀,汗,老美就喜欢这种old school的玩意儿。。。 http://www.amazon.com/gp/product/B0002SRL20/ref=as_li_qf_sp_asi