This paper points out one kind of new type four-connecting-rod self-locking hoist.

本文介绍了一种实用四连杆自锁吊具，能有效的解决较大重量的工件起吊。

youdao

This paper points out one kind of new type four-connecting-rod self-locking hoist.

本文介绍了一种实用四连杆自锁吊具，能有效的解决较大重量的工件起吊。

youdao