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N any of a class of exceptionally coarse-grained intrusive igneous rocks consisting chiefly of quartz and feldspar: often occurring as dykes among igneous rocks of finer grain 伟晶岩
The results of this study are significant in understanding the compositions, forming mechanisms and origins of pegmatites.
此成果对了解伟晶岩物质成分、形成机制及成因研究具重要意义。
The deposits occur in the old shield which is rich in dark rocks and pegmatites.
它们产于富含暗色岩和伟晶岩的古老地盾区内。
The feasibility of producing ceramic floor tile with clay and pegmatites was studied, and the experimental patch formula and chemical composition were given.
研究了利用粘土和伟晶岩生产陶瓷地砖的可行性，给出了试验配方和化学组成。
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