常見例句雙語例句The invention patent for counter-circulating evaporator of Chengda Chemical Engineering Corporation is already authorized and commercialized.中國成達(dá)化學(xué)工程公司反循環(huán)蒸發(fā)器發(fā)明專利已授權(quán)，并已工業(yè)化。 返回 patent of chemical invention