Each crank is made up of two crank webs joined by a common（） to which the bottom endbearing is fitted.
- Athrow
- Bcrankshaft
- Ccrankpin
- Dcrosshead
问题
Each crank is made up of two crank web
参考解析：
分类：船舶动力装置题库,海船船员考试题库
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