活塞杆密封 meaning in English

piston rod packing
rod bearing seal
rod seal

Progress on the sealing of piston rods in hydraulic cylinders of construction machinery
工程机械液压缸活塞杆密封的进展
Hydraulic fluid power - cylinders - housings for piston and rod seals in reciprocating applications - dimensions and tolerances
液压气动缸.往复运动用活塞和活塞杆密封腔的尺寸和公差
Hydraulic fluid power - housing for elastomer - energized , plastic - faced seals - dimensions and tolerances - rod seal housings
液压流体动力.弹性体塑料面密封件的汽缸.尺寸和公差.活塞杆密封汽缸
Hydraulic fluid power - cylinders - housings for piston and rod seals in reciprocating applications - dimensions and tolerances
流体动力系统和元件.气缸.往复运功用的活塞和活塞杆密封件的外套.尺寸和公差