取样腔上设有由取样阀控制的取样口。
The sampling chamber is installed with a sampling opening controlled by the sampling valve.
取样腔上设有由取样阀控制的取样口;
The sampling chamber is provided with a sampling opening controlled by the sampling valve.
为了安全起见我们要在取样点设双阀以便于安全的压降,取样口还要加护罩。
For safety we should use dual valves to aid safe pressure reduction, and cap the sample outlets.
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