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45# 40cr Steel Grade Seamless Steel Tube Rock Bolts Tensile Strength Bigger Than 180kn Yield Strength Bigger Than 125kn

45# 40cr Steel Grade Seamless Steel Tube Rock Bolts Tensile Strength Bigger Than 180kn Yield Strength Bigger Than 125kn
  Company Profile   Liaocheng Xinruyi Trading Co., Ltd built in year 2017 with registered capital of 3000, 000RMB, and...

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