短语
比例电压
ratio-voltage
直流电阻电压比例箱
Direct-current resistive volt ratio boxes
电液比例减压阀
electro-hydraulic proportional pressure reducing valve
;
electro-hydraulic proportional valve
电气比例压力阀
electro-pneumatic proportional pressure valve
电气比例压力控制阀
Electro-pneumatics proportional valve