... four-position switch；四位开关 four-position valve；四位阀 four-speed gearbox；四速点轮[传动]速箱 ...
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短语
二位四通阀
two-position four-way valve
;
two position four-way valve
三位四通电液阀
three position four-way electrohy-draulic valve
三位四通换向阀
way directional control valve
气动二位四通滑阀
PNEUMATIC TWO-PLACE AND FOUR-PASSAGE VALVE