Inserting a corded piping introduces bulk, which the machine presser foot is unable to surmount, therefore a special presser foot is necessary.
所产生的厚度是缝纫机压脚不能越过的，因此需要一个特殊的压脚。
Inserting a corded piping introduces bulk, which the machine presser foot is unable to surmount, therefore a special presser foot is necessary.
所产生的厚度是缝纫机压脚不能越过的，因此需要一个特殊的压脚。
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