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?????ˉ?????:20G-15CrMoG-12CrMoVG
?????ˉ????:GB5310-2008
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?????ˉ???????????????????ˉ????????????????5.88Mpa???????????450?????£?????????????????????ˉ??????????????9.8Mpa??????????????450?桫650??????????????????ú???????????????????????????ù???
???????ˉ???????:
??????????????ˉ??????:0635-8884428
??????????????ˉ??????:0510-88268136
??????????????ˉ??????:0551-5231696
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