基本解释[化學]半硬質pvc英汉例句雙語例句The flame retardant and smoke suppression effect of serial metal hydroxystannates on semi-rigid PVC was studied.研究了系列羥基錫酸鹽阻燃劑對半硬質PVC的阻燃消菸作用。semi-rigid pvc更多例句词组短语短語Color -coded Semi-Rigid PVC insulation 半硬質聚氯乙烯絕緣semi-rigid pvc更多词组专业释义化學半硬質pvc