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通过对４Ｌ－４４／２型空气压缩机的技术改造，已成功地将压缩机排气量提高２０．４％，并实现整机无油润滑，而且使压缩机整机运转率由３３％提高到９８％以上。
Through the technological transformation of the 4L-44/2 air compressor, the compressor displacement has been successfully increased by 20.4%, and the whole machine has no oil lubrication, and the compressor running ratio has been increased from 33% To more than 98%.