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Jack W4 Series - Threading method

Jack W4 Series
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2、穿线方法(Threading method)
①、标准穿线法(Standard threading method):
5-2
当机针线伸缩量较大时(When the expansion and contraction quantity of the
needle thread is big:):
5-3(Figure 5-3)
当机针线伸缩量较大时(When the expansion and contraction quantity of the
needle thread is big:):
5-4(Figure 5-4)
1

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