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weifang,Weifang,Shandong,China China
連絡先担当者 zhang james
住所 weifang, Weifang, Shandong
1.)material :40Cr or other(according to demand) AISI5140 2.)standard: API SPEC11B 3.Coat Thickness( in ): 0.01in-0.02in 4.Surface hardn
1.Coat Thickness( in ): 0.01in-0.02in 2. Surface hardness: HRC56-62 Basic hardness HRA56-62 3.Life: > 180days 4.Min. Tensile Strength:
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