... 过旋[由正超旋螺旋引起 overwinding 正旋进 progressive precession ; progre ive prece ion 正旋回 upwards sequence ...
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Because of the high precession and complicated construction requirements, the multi-stationed progressive die is hard to process with the traditional serial development besides a long production term.
多工位级进模精度要求高，结构复杂，传统的串行开发存在着制造难度大、生产周期长的缺点。
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