step chain safety device 梯级断链安全装置
broken drive-chain safety device 驱动链条保护装置
Drive chain Safety Device 驱动链安全装置
driver chain safety device 主驱动链断裂保护装置
safety chain device 安全连锁装置
chain safety device
链条安全装置
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The chain wheel overload protective device has the advantages of simple and reasonable structure, low cost, convenient manufacturing, safety and reliability.
本发明结构简单合理、成本低廉、制造方便且安全可靠。
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