玉米脱粒机生产厂家在生产过程中存在着许多问题，导致产品的合格率下降，甚至有许多假冒伪劣产品。
There are a lot of quality problems in the process of corn thresher production which caused the product qualification rate dropped.
玉米脱粒机生产厂家在生产过程中存在着许多问题，导致产品的合格率下降，甚至有许多假冒伪劣产品。
There are a lot of quality problems in the process of corn thresher production which caused the product qualification rate dropped.
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