On these cranes, the hydraulic RAMS that extend to raise up the crane do not push on the boom, but instead on a pivoting link-bar.

这些起重机，液压冲力并不是作用于吊杆上，而是作用于一个铰链连接杆。

youdao

On these cranes, the hydraulic RAMS that extend to raise up the crane do not push on the boom, but instead on a pivoting link-bar.

这些起重机，液压冲力并不是作用于吊杆上，而是作用于一个铰链连接杆。

youdao