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Semibituminous

1、半沥青的

... semibituminouscoal半沥青煤 semibituminous半沥青的 semicircle半圆 ...

2、优等烟煤的

... 优等烟煤 semibituminous coal 优等烟煤的 semibituminous 优选方位；定向排列 preferred orientation ...

semibituminous coal半沥青煤;优等烟煤;[矿物] 半褐煤;半烟煤

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