The piston rings carried in the ring groove are of two basic types: compression rings and oil-control ring.
安装在环槽中的活塞环有两种类型：压缩环和机油环。
Separately Mixed two different property molybdenum powder with the same nickel-chromium-boron-silicon alloy, then carried out plasma spray piston ring experiments.
试验用两种性能不同的钼粉与同一种镍基合金粉混合，进行了工业等离子喷涂活塞环对比试验。
Upper and lower piston rings are arranged inside a piston gaseous ring groove, and openings on the two-piece piston rings are mutually staggered.
在一个活塞气环槽内设有上下二片活塞环，二片活塞环上的开口相互错开。
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