Thermostatic expansion valve are （）.<br>A:either all the way open or all the way closed<br>B:normally open<br>C:throttled depending on load<br>D:controlled by suction pressure

Thermostatic expansion valve are （）.
A:either all the way open or all the way closed
B:normally open
C:throttled depending on load
D:controlled by suction pressure

出自：海船船员证

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