短語詞組短語proportional direction flow valve 比例方向流量閥proportional control flow valve 比例流量閥proportional flow divider valve 比例流量分配閥proportional flow regulating valve 比例調(diào)速閥proportional flow control valve 比例流量閥;比例式流量閥;比例流量控制閥;比例調(diào)速閥ELECTRO PROPORTIONAL FLOW CONTROL VALVE 比例流量控制閥electro -proportional flow valve 電液比例流量閥Proportional Directional -flow valve 比例方向閥Proportional ReliefAnd Flow Control Valve 比例式壓力和流量控制閥 返回 proportional flow valve