coal tar pitch
柯林斯词典
1. N a residue left by the distillation of coal tar: a mixture of hydrocarbons and finely divided carbon used as a binder for fuel briquettes, road surfaces, and carbon electrodes 煤膏瀝青
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1. N a residue left by the distillation of coal tar: a mixture of hydrocarbons and finely divided carbon used as a binder for fuel briquettes, road surfaces, and carbon electrodes 煤膏瀝青