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??????????|20#??θ??|?????θ??|??????????

????????????????????6-133mm?????1-25mm????????????????????????????????????????????

20#??θ??6*1-1.5     8*1-1.5-2      10*1-2-3      12*1-2-3  14*1-2-3-4     16*2-3-4     18*2-3-4     20*2-3-4-5      22*2-3-4-5-6     25*2-3-4-5-6

27*2-3-4-5-6-8    30*3-4-5-6-8     32*3-4-5-6-8     34*3-4-5-6-8

36*3-4-5-6-8-10    38-3-4-5-6-8-10    42-3-4-5-6-8-10    45*3-4-5-6-8-10

48*3-4-5-6-8-10-12   51-3-4-5-6-8-10-12-14   57*3-4-5-6-8-10-12-14-16

60-65*4-5-6-8-10-12-14-16   68-70*4-5-6-8-10-12-14-16-18

73-76-80*5-6-7-8-10-12-14-16-18     83-89*5-6-8-10-12-14-16-18-20

95-102-108-121-127-133*5-6-8-10-12-14-16-18-20-22-25

               ??ξ??????????????е???????豸???羫?????????????????????????t????????????е????????

???????????????е????????????????????????????????????????

??????????ó???С???????????????????????????????λ??????????????????????????????????????У??????????????????????ζ??????????ο??????????????????0.5??100T??????????????λ?????С?

??????????????????????????10??20????????????????????е??????????????飬????????????????顣

????????????????:[(??-???)*???]*0.02466=kg/??(????????)