Single cover retaining screw mounted on top of the indicator for easy access.
在流量指示器上安装一个盖子固定螺丝，便以打开进入。
Single cover retaining screw mounted on top of the flow switch for easy access.
在流量开关上安装一个盖子固定螺丝，便以打开进入。
Single cover retaining screw mounted on top of the flow switch for easy access.
在流量开关上安装一个盖子固定螺丝，便以打开进入。
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