difference pressure flow meter

• 差压式流量计

difference pressure flow meter的用法和样例：

例句

1. The ball flow meters can be built with common shop tools.
   动球式流量计可以用普通的工厂设备制出。
2. The metering of natural gas still presently depends on orifice flowmeter,one of differential pressure flowmeters.
   天然气计量现在仍以差压式流量计中的孔板流量计为主。