Tarmac原本是为一种黑色有粘连性并带难闻气味配合蒸汽碾路机使用的产品而准备的商标名称，注册于1903年。 而之后这个商标名称便顺理成章地成为了这种炼焦副产品的代名词。
Tarmac was originally a registered trademark from 1903 and the black, smelly, gooey consistency of the stuff as it’s steam-rollered in place gives an obvious clue to the tar part of the word.
煤焦沥青Coal tar：煤焦沥青是炼焦的副产品，即焦油蒸馏后残留在蒸馏釜内的黑色物质。
Coal tar is a by-product of coking, namely tar distillation residue in distillation kettle black material.
焦化粗苯是炼焦工业的副产品，精制可得到苯、甲苯及二甲苯等化工基础原料。
The crude benzol is the byproduct of coking industry, by the purification of which chemical foundation raw materials such as benzene, toluene and xylene can be obtained.
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