patent of chemical invention

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)，竝已工業(yè)化。
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