ジッパーに YKK が付いている理由と、1700 年代以前の完全に異なる色のニンジンとは何だったのか
ほとんどのジッパーのプルタブに「YKK」と書かれているのはなぜですか?
YKK: Japan’s Zipper King
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ジッパーについて知っておくべきことすべて
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Do you know facts about YKK? What is YKK? YKK ki zipper factory kaha hai? YKK #ykk #ykk_zipper