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   ?????λ?????? >> ????? >> GB8163-2008???????????????- ??-??20#??????????????????
  
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GB8163-2008????????????????- ??-??20#??????????????????

GB8163-2008????????????????- ??-??

20#???????????25*2-2.5-3-3.5-4-4.5-5

20#???????????27*2-2.5-3-3.5-4-4.5-5

20#???????????32*2-2.5-3-3.5-4-4.5-5-6

20#???????????34*2-2.5-3-3.5-4-4.5-5-6

20#???????????36*2-2.5-3-3.5-4-4.5-5-6

20#???????????38*2-2.5-3-3.5-4-4.5-5-6

20#???????????42*2-2.5-3-3.5-4-4.5-5-6

20#???????????45*2.5-3-3.5-4-4.5-5-6-8

20#???????????48*2.5-3-3.5-4-4.5-5-6-8

20#???????????51*2.5-3-3.5-4-4.5-5-6-8

20#???????????57*2.5-3-3.5-4-4.5-5-6-8

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