燃烧空气计量孔
combustion air metering hole
压力补偿计量孔
pressure compensation metering hole
标准流量计锐孔
standard metering orifice
磁力传动可变孔径式流量计
magnetic transmission variable aperture flow meter
积分式锐孔流量计
integrating orifice meter
记录式孔板流量计
chart-recording orifice meter
可变孔口流量计
variable orifice (flow) meter