Extract residues (coal), light oil alk., acid ext., Friedel-Crafts reaction products with isobutylene;Extract residues(coal),light oil alk.,acid ext.是什么意思_Extract residues (coal), light oil alk., acid ext., Friedel-Crafts reaction products with isobutylene;Extract residues(coal),light oil alk.,acid ext.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句