A life preserver shaped like a ring. horse shoe washer
救生圈圈状救生用具开口垫圈,马蹄形垫圈
When the screw bolt is rotated, the washer is forward pushed out, and thereby, the steel wire ring is tightly connected to realize the purpose of tightening ring.
隔板、垫圈位于螺栓上,其中钢丝环引出端从环的切线方向引出后被固定于隔板及垫圈上。
outer ring (housing washer)axis
外圈(座圈)轴心线
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