shaft

他的高尔夫球杆的杆身需要更换了。

The ___shaft of his golf club needs to be replaced.

我觉得自己在这次晋升中被不公平对待了。

I feel like I got the ___shaft in this promotion round.

工程师正在检查发动机里那根弯曲的轴。

The engineer is inspecting the bent ___shaft inside the engine.