圈 上海大 0.3707p 7.Acme thread .bf 架纹掂性 8.SI and GB trapezoidal thread 27 国上玖大隆 H=1.5878t h=0.75t k1=0.86777t i=0.419t r=0.124271 r=0.05t H=0.89064p:A=0.50286p5f=0.24532p: 8=0.13946p:F=0.27544p:r=0.12055n 附图2-1米制锯齿形螺纹牙型 9.Buttress thread锯齿形螺纹 10.Metric Buttress thread 2827 7. Acme thread 8. SI and GB trapezoidal thread 28 9. Buttress thread 锯齿形螺纹 10. Metric Buttress thread