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DSI Underground | Friction Bolt
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- Опубліковано 8 тра 2022
- DSI Underground’s Friction Bolt is manufactured from a high-strength steel tube with a slot along its entire length. A ring, or collar, is welded on the outer end to hold a domed plate to the rock surface, offering ground support with fast installation times and low-profile protrusion from the rock face.
Learn more: bit.ly/DSI-Fri...
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isnt it spring steel? spring steel holds it shape and that what provides the friction when it is forced into place?