将阀盖直接提起。
Make sure you apply pressure to the cover as you lift it straight off.
确保在将阀盖笔直提起的同时有压住阀盖。
Using an appropriate sized wrench, loosen the check valve cover. Unscrew the check valve cover and lift it off.
采用尺寸大小适中的扳手松开止回阀阀盖。宁松止回阀阀盖并将其取出来。
Using an appropriate sized wrench, loosen the check valve cover. Unscrew the check valve cover and lift off.
采用大小适中的扳手，松开止回阀盖。旋下止回阀盖螺丝并拿起。
Using an appropriate sized wrench, loosen the check valve cover. Unscrew the check valve cover and lift off.
采用大小适中的扳手，松开止回阀盖。旋下止回阀盖螺丝并拿起。
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