n. crankcase
misc. crank chamber
问题：在典型的柴油曲柄箱机油中，添加剂的浓度一般是多少？
Question: What concentration of additives might be found in typical diesel engine crankcase oil?
这一机构有一系列部件组成，如曲柄箱、气缸体、活塞、连杆、曲轴等。
The mechanism consists of several parts like crankcase, cylinder block, pistons, connecting rod, crankshaft, etc.
摇动筛依靠曲柄连杆机构使筛箱作往复运动。
Shaking screen on crank-connecting rod for reciprocating motion to the sieve case.
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