我提到这个是因为这样的复杂度，是细心读者应要留神的地方，对吗？
I mention this because such complications? Should alert the careful reader. Right?
开度指示机构应准确地显示阀门的开启状态。
The open angle indicating device should display the open state of the valve gate exactly.
开度指示机构应准确地显示阀门的开启状态。
The open angle indicating device should display the open state of the valve gate exactly.
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