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="k9do0"><strong id="k9do0"></strong></pre>

單項(xiàng)選擇題

In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the（）

A.pressurestat
B.high pressure cutout
C.solenoid valve
D.low pressure cutout switch

你可能感興趣的試題

單項(xiàng)選擇題

The pressure range between the system cut in and cut out pressures in a refrigeration unit is known as（）

A.opposing operational drag
B.pressure distribution
C.differential
D.system purge

單項(xiàng)選擇題

A fluid coil will （）large quantities of heat when it changes state from a liquid to a vapor.

A.release
B.absorb
C.develop
D.regenerate

<dd id="7shne"></dd>