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6060公公制制粗粗螺螺纹纹基基本本尺尺寸寸表表公称直径(d)螺距(t)标准径中径(d2)外螺纹外经*(d)内螺纹内经(d1)工作高度(h)圆角半径(R)1,2级最小3级最小最小最大选用钻头M2106206.10209.40209.20203.51204.213.250.874207.40209.58209.40205.67206.152.170.583208.05209.63209.48206.75207.131.620.43M2206216.10219.40219.20213.51214.213.250.874217.40219.58219.40215.67216.152.170.583218.05219.63219.48216.75217.131.620.43M2406236.10239.40239.20233.51234.213.250.874237.40239.58239.40235.67236.152.170.583238.05239.63239.48236.75237.131.620.43M2506246.10249.40249.20243.51244.213.250.874247.40249.58249.40245.67246.152.170.583248.05249.63249.48246.75247.131.620.43
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