主要用于 10.9 级高强螺栓。

It is mainly used for 10.9 grade high strength bolts.

自动快速回程机构设计，大大减轻劳动强度。

The design of automatic quick return mechanism greatly reduces labor intensity.

超行程红色警戒指示线，三级安全保护，确保操作者安

全。

Super stroke red warning line, three level safety protection to ensure operator safety