... switching-surge protective level 操作过电压保护水平,开关冲击波保护水平 swivel bolt 旋转螺栓 sychronization 并网 ...
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Bolt Hole Swivel caster 空颈万向脚轮
with flat-face swivel contact bolt 与平面旋转接触面螺栓
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When using the swivel chain between two cars, again through the bolt will turn on both ends of the chain (meet) the pin hole up and down together, and then the bolt locking.
使用时将转环链放于两车之间,再通过插销将转环链两端(碰头座)的上下销孔连接在一起而后将插销锁紧即可。
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