If necessary extend the probe of the dial gauge until you can definitely take measurements on the pistoncrown.
如有必要,延长百分表的探针,直到可以明确测量活塞顶为止。
2
This paper studies the fracture mechanics ofpistoncrown crack by means of finite element method and photoelastic method.
本文应用有限元法和光弹性试验对活塞顶的裂纹进行断裂力学分析。
3
Also the valve heads will be liable to be burnt by the passing hot gases, and there is the likelihood of the pistoncrown touching an open valve, which can seriously damage the engine.