99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<pre id="pigsc"><acronym id="pigsc"><cite id="pigsc"></cite></acronym></pre>

<ins id="pigsc"><xmp id="pigsc"></xmp></ins>

單項選擇題

This arrangement is （） if the elements are directly connected to one another and the control action takes place without human involvement.

A.a manual closed loop
B.a manual opened loop
C.an automatic closed loop
D.an automatic opened loop

你可能感興趣的試題

單項選擇題

Bourdon Tube is probably the most commonly used （） measuring instrument.

A.the absolute pressure
B.the gauge pressure
C.the vacuum pressure
D.the differential pressure

單項選擇題

Movement of the diaphragm or bellows is （） by a linkage to a needle or pointer display to indicate the differential pressure between two sides of the diaphragm or bellows.

A.measured
B.recorded
C.transferred
D.controlled

<dl id="ouqzb"></dl>

<ins id="ouqzb"></ins>