On small, low pressure, air compressors, the cylinders are usually lubricated by the （）.
- Asplash method
- Bmechanical force feed lubricators
- Cdetached sump method
- Dinternal cooling passages in the crankshafts and connecting rod
问题
On small, low pressure, air compressor
参考解析：
分类：船舶辅助机械题库
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