Make sure the bolt and washer are installed for the right aft mount on the APU shroud.
确证在APU保护罩的右后吊点上安装了螺栓和垫圈。
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。
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