Опубликовано в "Наука, Наука", язык - English. 3 страниц.
Coal tar is a thick black liquid that's a byproduct of coke production. As an extra product of the cause of action (COA) process that results in the production of coke, this liquid is a versatile product in its own right. There are actually quite a few uses for this viscous liquid, ranging from building and home repair all the way to medical treatments. Еще
