And so we know the force for a particular mass, and we know the area of the piston.
我们知道每个质量对应的力，也知道活塞的面积。
2
The main section of a piston is known as the skirts. It forms a bearing area in contact with the cylinder wall.
活塞的主要部分叫活塞裙部。其与气缸壁接触形成了支承面。
3
Through anchors identified by the work pressure, intensity degree, reasonable terms, choiced piston confined area and the size of hydraulic tank diameter.