偏置阀门，使阳极电流为零或很小。

Bias the <em>valve</em> so that the anode current is normally zero or small.

当阀门开到顶时，两个临近开关就会感测到。

Two proximity switches detect when the <em>valve</em> has reached the end of its travel.

开关一下阀门，确保它们开闭自如。

Open and close the <em>valve</em>s to make sure they don't get gummed up.

阀门关不上。

The <em>valve</em> won’t close.

单向节流阀是阀门的一种。

Throttle <em>valve</em> is a one-way <em>valve</em>.

单向节流阀是阀门的一种.

Throttle <em>valve</em> is a one - way <em>valve</em>.

这样赶快换好阀门就能开总阀了。

So quickly changed the <em>valve</em> can open the total <em>valve</em>…

所需阀门通径是多大?

What is the <em>valve</em> size needed?

在位置在阀门的开口。

On location at <em>valve</em> openings .

试剂输送管道及阀门；

Conduit and <em>valve</em> for reagent. ;