n. hammerlock
misc. locking arm
单边控制保险机构，齿轮锁臂装置，多重保险设计，更加安全。
Single side safety control, arm locks with tooth type ratchet, multi-safety device, more reliable.
设有多重安全保护装置：超重装置，断链装置，托臂自锁保护，上升过程中的自锁装置。
There are multiple safe protectors: Overweight device, chain fracture device, trailing arm lock protect, device of the lock when it rised.
这种锁缝筒形横臂机被主要用于男式外套的生产。
This lockstitch cylinder arm machine is mainly used in the production of men's outerwear.
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