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Sulfur resistive heavy weight drill pipe
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High antitorque, anti-rock drilling rod
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The high-strength drill pipe of laced belt muff
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Anti-shake drilling rod with antifriction band
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High strength safe type drilling rod
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Flanging shaping device for drill pipe protective casing
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Production line of flanging type protective sleeve of drill rod
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Drill pipe protective sleeve external flanging pressing device
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Plate bending device for drill pipe protective jacket
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Welding device after round coiling of drill rod protection sleeve
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Drill pipe protective sleeve internal flanging pressing device
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Production line of flanging type drill rod protective sleeve
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Inner flanging type drill rod protective jacket production line
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Internal flanging production line for internal flanging type drill rod protection sleeve
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Drill pipe protective sleeve plate circularizing device
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Board-to-round-tube production line for drill rod protection sleeve
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Inner flanging and shaping device of drill rod protection cover
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Plate punching device for drill pipe protective casing
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Reinforced type drill rod inner-thread protection sleeve
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Magnetic powder inspection sprinkling device
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