基本解釋[經濟學]硬焦油瀝青英漢例句雙語例句The performance and usage of coal-tar asphalt were introduced. Meanwhile, it was assumed the excellent characteristics, mechanism and technology of the modified coal tar pitch.介紹了煤瀝青的性能、用途以及有廣泛用途的煤焦油改質瀝青的優(yōu)異特性，改質機理和生產工藝；asphalt-tar pitch更多例句詞組短語短語asphalt -tar ? pitch 硬焦油瀝青coal -tar asphalt tar pitch 煤焦油瀝青asphalt-tar pitch更多詞組專業(yè)釋義經濟學硬焦油瀝青