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钢丝连续退火,通电加热比较合适。然而,怎样把移动的钢丝通上几十或几百安培的低压电流呢?用炭刷和金属刷都有缺点,会在钢丝表面产生火花。
Continuous annealing wire, electric heating more appropriate. However, how to move the wire through tens or hundreds of amps of low-voltage current? Carbon brush and metal brush have shortcomings, will produce sparks in the wire surface.