1. 日本发明的永不松动螺母，利用古老的楔形增力原理实现防松
2. 日本永不松动螺母，卖19元1个，是国产普通螺母的42倍，钱都被日本赚走了
Warning：Without the written permission of the author, it is strictly forbidden for foreign media to reprint, copy or screenshot the relevant content of this article.
1. 日本发明的永不松动螺母，利用古老的楔形增力原理实现防松
2. 日本永不松动螺母，卖19元1个，是国产普通螺母的42倍，钱都被日本赚走了
Warning：Without the written permission of the author, it is strictly forbidden for foreign media to reprint, copy or screenshot the relevant content of this article.
