... electric sewing machine 电动缝衣车 英语沙龙 spool pin 线柱 thread guide 引线器 ...
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arm spool pin [五金] 插线钉
Spool pin washer 插线钉垫圈
SPOOL AND PIN 卷盘和销钉
The design of this pin is rather complex, with not only a nippled tip but also a very spool like appearance.
珠子的设计比较复杂,除了带有球头之外珠身还很像纺织线轴。
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