free tar 中文意思是什麼
free tar
解釋
游離柏油-
Standard specification for coal tar roof cement, asbestos free
無瀝青煤焦油屋面水泥的標準規范 -
Tar is removed from coal in the pyrolysis to form free flowing light oil, which can be recycled with extensive application
能夠將煤中的焦油干餾出來,形成流動性好的輕油,用途廣泛,可以回收。
分享友人