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Contains friction bolts, an extension tube that can radiate expansion, an expansion device prepared in the tube, a large extension device prepared in the tube, connected to a polishing device, and a fixture, Methodo, and installation tools. A month ago
Contains friction bolts, an extension tube that can radiate expansion, an expansion device prepared in the tube, a large extension device prepared in the tube, connected to a polishing device, and a fixture, Methodo, and installation tools. A month ago
Friction Bolt through Friction to engage the inside surface of a Hole drilled in a Rock cover,Circular and elongated Tube comprises a radially Expandable, expander mechanism disposed within a tube to apply a loadTendon elongated; method; installation tool.
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