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焦油使用
environ. tar use Any employment or utilization of dark, heavy, viscous substances or residue derived from the distillation of certain organic materials, often to produce benzene, soap, dyes, cosmetics and other products (深色的、重、粘性物质或来自某些有机材料蒸馏的残留物的职业或利用,常用于生产苯、肥皂、染料、化妆品等产品。)
tech. tar use