考查了铸造用天然硅砂的矿物晶体形态， 可将其大致分为单晶体和多晶集合体两类。

The mineral crystalline morphology of foundry natural silica sands has been investigated, which can be divided into two groups:single crystal and polycrystalline gather.

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考查了铸造用天然硅砂的矿物晶体形态，可将其大致分为单晶体和多晶集合体两类。

Thus, the mineral crystalline morphology of natural silica sand is an important parameter for use in foundry.

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