An overdose of sun, sea, sand and chlorine can give lighter hair a green tinge.过量接触阳光、海水、沙粒和氯气会使浅色头发略呈绿色。Chlorine is usually liquefied before use or storage.氯在使用和贮存以前通常要液化.Derivatives of bromine are much more active than...
Hard elastic polypropylene is formed by crystallized under strain and annealing.硬弹性聚丙烯是在应变结晶和热结晶两个复合过程中形成的.The suitable recovery strain annealing temperature was 500 ℃.适宜的回复应变退火温度为500℃.To optimize sub - job assignments, ...