Phosphate rock (mainly calcium phosphate) is one of the four most important basic chemical commodities.

磷酸盐类的岩石(主要是磷酸钙)是四种最重要的基本化学商品之一。

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Phosphate rock (mainly calcium phosphate) is one of the four most important basic chemical commodities.

磷酸盐类的岩石(主要是磷酸钙)是四种最重要的基本化学商品之一。

youdao