N a chain on the fastening of a bracelet, watch, etc, to ensure that it cannot open enough to fall off accidentally (手链、手表等防止突然开口掉落的)安全链条 (Also called guard)
Own turn bale devices, electrical safety chain lock.
自带翻包装置,电动安全联锁。
The bolts at bent links of safety chain should be secured by double nuts.
使用在弯曲连接器的安全螺栓必须用双螺帽固定住。
Check safety chain hookup. Make sure all warning lights are hooked up and functioning correctly.
检查安全链,确认所有的警示灯是正确连接好了。
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