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China Wholesale 4140 Hard ChromeCarbon Steel RoundBar US $600.00-$700.00/ Ton 1 Ton(Min Order) 5YRSShanghai Juqing Metal Product Co., Ltd.China 4140 12mm Hard Chrome Plated Steel Bar 42CrMo4 China 4140 12mm Hard Chrome Plated Steel Bar 42CrMo4, Find details about China Hard Chrome Plated Steel Bar, C45e Chrome Bar from 4140 12mm Hard Chrome Plated Steel Bar 42CrMo4 - EAST AI MACHINERY CO., LIMITED Hot Products China Products Chinese Manufacturers/Suppliers China Wholesale Wholesale Price Industry Sites Regional Channels Product