Dab tsi yog qhov ntom ntawm Coal Tar

Coal tar tau muab faib ua peb hom: low-temperature coal tar, medium-temperature coal tar, thiab high-temperature coal tar.

Coal tar muaj qhov ntom ntom ntawm qhov sib txawv 1.17 thiab 1.19 grams rau cubic centimeter, txhais hais txog 1.17 rau 1.19 tons ib cubic meter.

Hauv kev sib piv, qhov ceev ntawm biotar feem ntau zaum ntawm ib ncig 1.2 grams rau cubic centimeter, sib raug rau 1.2 tons ib cubic meter.