活塞顶部 meaning in Chinese

piston head

It is thick at the top where it takes the brunt of the heat and the expansion force
活塞顶部厚，承受着高温燃气的带有冲击性的高压力。
In simplest terms , piston rings are thin , circular pieces of metal that fit into grooves in the tops of the pistons
简单地讲，活塞环就是装在活塞顶部的凹槽里的薄，圆的金属。
The maximum thermal stress will rise while the thickness has been reduced , the intensity of piston will decline , and the progress of the engine power will be affected
活塞顶部厚度越小，活塞的最大热应力值也将增大，从而使活塞的强度变低，活塞的寿命缩短，影响发动机的强化程度的提高。
Finally , this paper has investigated the relation between the thickness of piston head and temperature field , thermal stress : the whole temperature field will rise while the thickness has been reduced . the temperature difference will also go up
最后，本文研究了活塞顶部厚度对活塞温度场和热应力的影响规律：活塞顶部厚度越小，活塞的整体温度将要升高，活塞顶部与活塞内腔的温差也要增大。