【名词&注释】
毛细管(capillary)、热力膨胀阀(thermostatic expansion valve)、单元式空调机(unitary air conditioner)、多种形式(various forms)、浮球阀(float valve)、热电膨胀阀(thermal electric expansion valve)
[单选题]节流机构有多种形式,单元式空调机适宜采用()。
A. A、毛细管
B. B、热力膨胀阀
C. C、热电膨胀阀(thermal electric expansion valve)
D. D、浮球阀(float valve)