The invention patent for counter-circulating evaporator of Chengda Chemical Engineering Corporation is already authorized and commercialized.
中国成达化学工程公司反循环蒸发器发明专利已授权，并已工业化。
The invention patent for counter-circulating evaporator of Chengda Chemical Engineering Corporation is already authorized and commercialized.
中国成达化学工程公司反循环蒸发器发明专利已授权，并已工业化。
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