But the quality of the rock wool quality can vary widely, heat preservation function good density low, the tensile strength is also low, durability is poorer.
但岩棉的质量优劣相差很大，保温机能好的密度低，其抗拉强度也低，耐久性比较差。
2
In the field of thermology, diamond's heat-durability and heat conductivity were enhanced.
在热学方面，使金刚石的耐热性和导热性均有增加；
3
The results show that AS cement possesses high early strength, low hydration heat and durability, but its shrinkage rate is higher than that of portland cement.