But chemical moments mordants such as alen alum are popular today.但是像明矾这样的化学染剂现今很流向.But chemical mordents mordants such as allon alum are popular today.但是化学腐蚀剂例如明矾现在很流行.Conclusion: Alum and dried alum have significant ba...
它们有哑铜的，古铜的和镀银的。They are available in polished brass, antique brass or silver-plate.要求学生们检验铜的纯度.The students are asked to prove the purity of copper.夹头和电极之间的接触面是银的或铜的.The contact area between clamp and terminal is either ...
...the serrated edges and veins of the feathery leaves.羽状叶子的锯齿边沿和纹理a serrated edge锯齿状的边Two - part serrated nozzle for easy removal without detaching hoses.不用与内部管路分开,就可以轻易拆开、装管口喷嘴.Slash the tops of the loaves with a sharp...