- hollow threaded drilling bar
- 2016-11-01 22:45
- Hollow threaded drilling bar isusedtogetherwithdomeplateandnutforreliablegroundsupportincoalmines,railways,hydropower,tu
- split set friction anchor bolt
- 2016-10-29 08:26
- Split set frictionboltconsistsofonlytwoparts,atubeandmatchingdomedbearingplate.Thehighstrengthsteeltubeisslottedalongit