Patents
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- Guoan Xu , Self-drilling differential grouting combined bolt and anchoring method therefor
- Guoan Xu , Self-drilling differential grouting combined bolt and anchoring method therefor
- Self-drilling differential grouting combined bolt and anchoring method therefor
- A sectional modular large-deformation-resistant impact-resistant composite rock bolt and its assembling method
- Sectional modular large-deformation-resistant impact-resistant composite rock bolt and its assembling method
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