1、[动力]气环
... compression ring 气环 comprex 气波增压器 concentration of emission 排放浓度 ...
2、压缩环
好象是你一个人在自问自答，但是你说的应该是压缩环(compression ring)的公式，而油环(oil ring)的公式里，h则是两条油腿的和。
3、活塞平环
... compression refrigerating machine压缩式制冷机 compression ring活塞平环 compression space压缩空间 ...
4、压环
...gusset plate 筋板compression ring 压环，环形盖板washer 垫板 ...
compression piston ring活塞气环
compression inner ring活塞环扩张器
barrel type compression piston ring鼓形活塞压缩环
taper-face compression-ring锥面活塞压环
SECOND COMPRESSION RING第二道气环;第二压缩环;第二道压缩环;次进汽门
piston compression ring活塞压缩环
headlamp compression ring头道气环
Intermediate compression ring中压缩环
stiffness of compression ring外压环梁刚度