n.定容计时阀 fixed-volume metering valve: 定容计时阀fixed-volume metreing valve: 定容计时阀metering valve: 定量阀; 计量阀; 计量油门; 配量阀; 限量阀; 限流阀,限压阀brake metering valve: 闸板调节阀; 制动调节阀flow metering valve: 流量控制阀下载手机词典可随时随地查词查翻译