GB5310?????ˉ??+20G?????ˉ??+???????????ˉ????? 
??ˉ??_?????ˉ??_GB5310?????ˉ??_20G?????ˉ??_????????ˉ??_????????ˉ??_????????ˉ??_????????ˉ??_?????????ˉ??_????????ˉ??_????????ˉ??_????????ˉ??_???????ˉ??_????????ˉ??_?γ?????ˉ??_???????ˉ??_????????ˉ??_????????ˉ??_????????ˉ??? 
   
???????????????????????????????????ˉ????????ˉ???????????????????ˉ?????????GB5310-1995???????????????????????????????ˉ?????????????????????????????????????  
???????????????????????????????????ˉ???????ˉ????? ???????????GB/T3077-1999??????????????????????????????????????????????????????????????????????? ???????????????????辭?????????????????????????????????????????辭?????????滯??????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 
??????綽??18921511196??????????????綽??0510-88268136?? ??????綽??13812042226????????????????棺0510-88267553?? 
                       
                       
                      ?????????????????????????????????????????????????????????????????????????????????????????С???????????????????????????????????????????????????????????,??????????????20#??45#??16MN??Q345??A/B/C/D/E????27SIMN??15CrMO??12Cr1MOV??10CrMO910??304??304L??316??316L??321??P11??P22??P91??T91.??й???GB8162-99?????GB8163-99????????????ù?????????GB3087-99??GB5310-85????????ˉ?ù??GB5312-8???ù??... 
                      ???????????0510-88264321??88223334 ???棺0510-88223334 ?????18921237777 
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