当螺丝刀就位后，拆卸图f中的E夹和连接结构部件的销钉，则止回阀阀瓣将在没有张力的情况下开启。
When the screwdriver is in place, remove the E-clip (Figure F) and pin connecting the structural members and the check clapper will open with no tension.
当螺丝刀就位后，拆卸图f中的E夹和连接结构部件的销钉，则止回阀阀瓣将在没有张力的情况下开启。
When the screwdriver is in place, remove the E-clip (Figure F) and pin connecting the structural members and the check clapper will open with no tension.
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