20???п???? ??219mm???п????? ?????????????
20???п?????
?????п????????6????????????????п???????????????????????????????????п2????????п????????????????????????????????????п???????????????0510-88268136
??219mm???п??????
219mm??п????????6????????????????棬??????????5.1?/?????ο???????????????QQ??709154628
??????????????
????????????????GB/T8163-2008????????????????????????????????????
??????????????????[(??-???)*???]*0.02466=kg/?????????????
??б??
?й??????? GB/T8163
???
????????????????????塣
?????????????
10#??20#??Q345
?????????????????????????????????????????????????????????????????????????????????????????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
|