He lowers the crane's massive hook.

他放下起重机大吊钩。

My room was only partly furnished and had no bathroom - it just had a basin and a hook for a towel.

间只有部分家具而且没有浴室——只有水池和挂巾吊钩。

Two hook blocks—one on the main boom and one on the jib can be used to operate the crane.

两吊钩块（位于主臂，位于副臂）可用于操作起重机。

It is the sturdiest crane of its type and has all the capabilities and adaptability of a fully mobile ring crane, including winches and cables, hook blocks, and a 360 degree slewing capability.

它是同类中最坚固起重机，具有完全移动式环形起重机所有功能和适应性，包括绞车和电缆、吊钩组以及 360 度回转能力。