The fire retardingeffect of phenolic flame-retardants on Korean pine wood was studied experimentally.
用实验方法研究了酚类阻燃剂对红松的阻燃作用。
2
The fast setting of most building gypsum is unfavourable for construction. So the retardingeffect of impurities can be utilized positively.
对凝结非常迅速而不利于施工的半水石膏而言,杂质的缓凝具有利用价值。
3
Besides, this result indicates that addition of citric acid has an obvious setting retardingeffect on gypsum but may reduce the mechanical performance of its products.