相对压力又称为（）。

液压系统中油液的压力取决于（），执行元件的速度取决于进入执行元件的（）。

未知题型液压系统中油液的压力取决于（），执行元件的速度取决于进入执行元件的（）。

液压传动过程中一定要经过（）次能量转换。

未知题型液压传动过程中一定要经过（）次能量转换。

To get … Water needed ...

问答题 To get … Water needed a kilogram of chocolate ______ a kilogram of beef ______ a kilogram of rice ______ a hamburger ______ an apple ______ a slice of bread ______
This article uses both gallon and liter as a unit of measurement for water. You will likely be most familiar with liter, as most of the world uses this unit of measurement for liquids. In the U.S. and the U.K., however, gallon is still commonly used. However, the size of one gallon differs in these two countries. In the U.K., the imperial gallon is about 4.5 liters. The U.S. gallon is about 3.8 liters. When gallon is used in this unit, it refers to the U.S. gallon.