Deepening study was carried out of the synthesis of polyvinyl formal, its reactionlaw was summed up and optimum technological conditions were presented.
深入研究了聚乙烯酸缩甲醛的合成工艺，归纳了反应规律，提出了最佳工艺条件。
2
Hess 'Law states that for any chemical reaction, the energy change is path independent.
盖斯定律表明，对于任意化学反应，能量变化并非是路径依赖的。
3
Locality of action shows itself in the finite speed of light, in the inverse square law of fields, and in macroscopic statistical effects, such as rates of reaction and the speed of sound.