dispersed shrinkage meaning in English

分散缩孔(铸疵)
群状缩孔

Dispersed shrinkage is the main reason causing leakage of multi - cylinder heads of diesel engines
摘要缩松缺陷是导致多缸柴油机缸盖铸件渗漏的主要原因。
It is because that the forging and heat treatment can greatly change the mechanical properties of steel , reduce the shrinkage cavity and dispersed shrinkage in metal structure , and keep the organizational structure tighter
通过锻造和热处理，可大大改变钢材的力学性能，减少金属结构内的缩孔缩松现象，使其组织结构更紧密。