decremeter

例句：

1. 1. The weight of the water in the tank has decreased significantly since the pump was installed.
   自从安装泵以来，水箱里的水重量已经显著减少了。
2. 2.The factory uses a decremeter to measure the amount of materials used.
   这家工厂使用一个减量器来测量使用的物料量。
3. 3. The engineer adjusted the decremeter to ensure accurate measurements.
   工程师调整了减量器以确保准确的测量结果。