outlines of crystal aggregates 析晶集合体形态
Opal, crystal and twelve types of aggregates from Beijing were studied with this new method.
利用这种新方法对蛋白石、水晶和十二种来自北京的一般骨料的碱活性进行了研究。
youdao
应用推荐
模块上移
模块下移
不移动