When added in certain ratio, their combined effect is found to be very effective.A.C. impedance also shows that the pore rate of mortar is red...是什么意思_When added in certain ratio, their combined effect is found to be very effective.A.C. impedance also shows that the pore rate of mortar is red...在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句