常見(jiàn)例句雙語(yǔ)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(duì)半硬質(zhì)PVC的阻燃消菸作用。 返回 semi-rigid pvc