Coal pitch, ipfupi kune marasha tar pitch, marasha tar distillation kugadzirisa mushure mekubviswa kwemvura ine distillate yasara, ndeyemhando yeasphalt yekugadzira, kazhinji kune viscous fluid, semi-yakasimba kana yakasimba, dema uye inopenya, kazhinji ine kabhoni 92. ~ 94%, hydrogen inenge 4 ~ 5%. Marasha ...
Verenga zvimwe