| 1 | Water jet soil reaming parameters were analyzed based on the water jet theory and the soil mechanical theory. Some relationships between water-jet parameters and soil parameters were established. | |
| 2 | This was thought to be due to the thin cortical walls as a result of the larger reamer diameter in this group. | |
| 3 | The aperture of the copper-based catalyst can be increased, the activity and the thermal stability of the copper-based catalyst can be improved by the forming expanding agent. | |
| 4 | Mainly Renmo milling cutter, reamer, pulling knives, plate-shaped lathe tool, knife inserted teeth and bore drilling. | |
| 5 | The utility model discloses a hole-enlarging device for enlarging holes in underground pipeline, belonging to the field of construction machinery for civil engineering. |
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