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China Professional Production Spiral Gear for Drilling Rig (OD1550mm)

China Professional Production Spiral Gear for Drilling Rig (OD1550mm)
 Product DescriptionSpiral gear features: 1) Max. OD2000mm 2) Max. Mould 36 3) Material: 42CrMo, 20CrMnMo, 20Cr2Ni4,...