- changeoer ale
- changeover valve
- 多向: multiway; multidirection
- 阀: established house or power g ...
- 多向: multiway; multidirection◇多向分类 multiway classification; 多向分组 multiway classification; 多向鉴幅[振幅比较]电路 multiar circuit
- 单向阀,正向阀: non-return valve
- 多向的: multiaxial; multidirectional; polydirectional
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