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637 TCI Roller Cone Bits Deep Well Drilling 9 1/2" IADC
2025-04-13
introduction 3960
9 1/2 Inch
Customized
AISI, API
Well Drilling
6 5/8 Inch
Journal Bearing
Golden or as You Wish
3
Medium Hard Rocks
637
superior
Wooden Case
Tungsten Carbide
Hejian, China
8207191000
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