alexsung wrote:
斜纹改直纹比较好,可直接买直纹铜棒车削而成.
Y12345678B wrote:
有上海秉宜,德事隆
不在惠州。
mygile wrote:
版主闹笑话了,如果从加工上看,当然是直纹占优,但做INSERT NUT就有差点了,因为直纹的易拔出,做拉拔测试是过不了关的.
alexsung wrote:
INSERT NUT主要靠中央的横槽来承受拉力.
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