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活塞缸筒
 活塞缸筒
oil piston bore
| 衬套
 衬套
hydroel.st. bush
met. liner; nave; sleeve
racing collar
skydive. bushing
space bushing; hub; sabot

to phrases
活塞缸筒
oil piston bore
活塞缸筒
: 2 phrases in 2 subjects
Automobiles1
Drilling1