Single side safety control, arm locks with tooth type ratchet, multi-safety device, more reliable.

单边控制保险机构，齿轮锁臂装置，多重保险设计，更加安全。

youdao

Single side safety control, arm locks with tooth type ratchet, multi-safety device, more reliable.

单边控制保险机构，齿轮锁臂装置，多重保险设计，更加安全。

youdao