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pitchstone

释义

na. 【地】松脂石; 网络释义: 松脂岩;

例句

The pearl ore includes the pearlite, shines black the crag and the pitchstone.
The pitchstone has the unique resinous luster, the water content 6~10%;
松脂岩具有独特的松脂光泽,含水量6~10%;

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