volumetrical displacement meter

例句：

1. 1. The engineer used a volumetrical displacement meter to measure theair pressure in the tank.
   工程师使用一个体积位移计来测量油箱中的气压。
2. 2. Thevolumetrical displacement meter was usedto determine the exact amount of gas thathad been displaced.
   体积位移计被用来确定已经置换了多少气体的确切量。
3. 3. The volumetrical displacement meterwas used to measure the volume of theliquid being pumped.
   体积位移计被用来测量正在泵送的液体的体积。