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             China is the world's largest producer and consumer of steel. In recent years, in order to meet the processing demand of the industrial market, various laser processing systems used for cutting pipes have come out. In recent years, with the rapid growth of the production and consumption of metal pipe 
             
             
             
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             Laser manufacturing technology has many advantages that traditional manufacturing technologies do not have, such as low material waste, low manufacturing costs in large-scale production, programmable control according to production processes, high production efficiency in large-scale manufacturing, 
             
             
             
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             Core tip: fiber laser, optical fiber is used for the transmission and the laser gain medium, its design and production depends on the mature development of high power optical fiber devices, so the fiber laser from a technical threshold on the obvious difference with the traditional solid laser.This 
             
             
             
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