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Horizontal directional drilling (HDD) rigs are specialized equipment used for trenchless installation of underground utilities, such as pipelines and cables. These rigs offer several advantages and have distinct characteristics:

Advantages:

1. Minimal Surface Disruption: HDD rigs create underground pathways without extensive excavation, reducing disruption to the surface, minimizing traffic congestion, 

and preserving landscaping.

2. Environmental Friendliness: By minimizing excavation and reducing the need for open trenches, HDD rigs help protect the environment and avoid soil contamination.

3. Versatility: HDD rigs can be used in a variety of soil and rock conditions, making them suitable for a wide range of projects, including water, gas, and electricity utilities.

4. Cost-Effective: While the initial setup cost may be high, HDD can be more cost-effective in the long run due to reduced restoration and surface repair expenses.

5. Reduced Risk: There is a lower risk of utility strikes, worker accidents, and damage to existing structures when compared to traditional trenching methods.

HWF135 main technical parameters：