Place the screw back into the relief valve disc and tighten.

将螺丝放回到安全阀阀瓣内，并加以紧固。

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Screw back wood cap.

旋回木盖。

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Screw Rotation Feeds and Shears Material Into a Melt. Melt Collects Into Front of Barrel, Forcing Screw Back.

通过螺杆回转，熔体聚集于料筒前部，反作用力使螺杆后退。

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Screw Rotation Feeds and Shears Material Into a Melt. Melt Collects Into Front of Barrel, Forcing Screw Back.

通过螺杆回转，熔体聚集于料筒前部，反作用力使螺杆后退。

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