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.
同常规型游梁式抽油机比较，该机型可以显著降低曲柄输出轴的最大扭矩，减小甚至消除负扭矩，在降低能耗的同时改善了减速箱的受力状况。
Compared with conventional beam pumping unit, the swing-rod beam pumping unit can reduce the maximum crank axle torque markedly, reduce and even eliminate negative crank axle torque.
同常规型游梁式抽油机比较，该机型可以显著降低曲柄输出轴的最大扭矩，减小甚至消除负扭矩，在降低能耗的同时改善了减速箱的受力状况。
Compared with conventional beam pumping unit, the swing-rod beam pumping unit can reduce the maximum crank axle torque markedly, reduce and even eliminate negative crank axle torque.
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