single ported thermostatic expansion valve
... single expansion steam locomotive 单胀式蒸汽机车 single ported thermostatic expansion valve 单向膨胀阀 continous single-valley expansion 单谷扩充连续解 ...
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single ported thermostatic expansion valve
单口恒温膨胀阀
以上为机器翻译结果，长、整句建议使用 人工翻译 。