In a medium speed diesel engine, a trunk type piston may be cooled by（） Ⅰ.oil circulation though passages in the piston crown Ⅱ.heat transfer through piston rings and liner wall
- AⅠ only
- BⅡ only
- Ceither Ⅰ or Ⅱ
- Dneither Ⅰ or Ⅱ
问题
In a medium speed diesel engine, a tr
参考解析：
分类：船舶电气与船舶安全题库
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