免费注册 手机版 网站地图 小工具

学而优·知识库

首 页
In diesel engines designed with a crosshead, the motion of the piston rod can be described as _____.
A、reciprocatingatthepistonpin,rotaryatthecrankpin
B、reciprocatingatthecrankpin,rotaryatthepistonpin
C、straightreciprocation
D、straightrotation
参考答案

关闭

前往注册

我已注册,登录账号 继续查看答案