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δ??????????纣???罭???羶??????????????????????????????????????????й????Э???????2015????????????????????????????450?????г??????????
??????д???????????????????????г?????????????ε?????????????????????????????????????????????????????
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???б????????45#??50#??,45#??50#?????????????????????,??Щ????????????????.???????????????,?????????2.0MM,2.5MM,3.0 MM,4.0MM,5.0MM,6.0MM,10MM,12MM,16MM,20MM,30MM???.???10MM???????????1260??,10MM?????2000????2200??
????|?????|?????|?????|?????|?????????|?????????|????|?????|???????????|?????????|???
???????????????й??????????????????????????????????ASTM??ASME????????JISS????????DIN?????
???BS????????? IO????????EN ???????????????????????????????????и??????????????????????
?????????8-600mm???4.5m ??????18m????????????????? ?????????????????????m??0.5mm????????
100mm???8mm?????γ???1mm???и??????? 100mm?12.5????100mm?25???и??????????????
??????????????34????????????????????÷?Χ?I??=??