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="u1hc8"><acronym id="u1hc8"></acronym></pre>

<pre id="u1hc8"></pre>

單項選擇題

The device used for low-pressure control and high-pressure cutout on a compressor is called （）.

A.cutout
B.controller switch
C.pressure controller
D.cutout switch

你可能感興趣的試題

單項選擇題

In a vapor compression refrigeration the evaporating pressure is maintained constant by the action of the （）, which removes vapor from the evaporator at the same rate at which it is formed.

A.evaporator
B.compressor
C.condenser
D.none of the above

單項選擇題

What is the function of thermostatic expansion valve in a compression refrigeration system?（）

A.nonexistent
B.for controlling pressure
C.for controlling superheat
D.for controlling the solenoid valve

<dd id="kf8yd"></dd>

<ins id="kf8yd"></ins>