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1. Analysis of the prospect of frequency conversion of paper machineThe paper industry is one of the basic industries in China. The domestic pulp and paper enterprises are large and widely distributed, and occupy an important position in the entire national economy. It is one of the four major inventions in China. Papermaking machinery consists of raw material preparation, pulping, paper making, reels or flat sheets, and machinery for processing paper and paperboard.According to statistics, China has more than 37.8 million tons of production capacity, single machine production capacity of more...