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(iv) Plastic: Certain manholes may use high-density polyethylene (HDPE) or other plastic materials, particularly in corrosive soil or chemical environments. Plastic manholes offer resistance to corrosion and are lightweight, making them easier to handle and install.

The Role of Gate Valves in Korea's Industrial Landscape

3. Slip Resistance Rating Refer to industry standards for slip resistance. Manufacturers typically provide ratings that indicate how well a cover will perform under wet conditions.

Conclusion

Challenges and Considerations

Conclusion

In some cases, residential communities use custom bollards as part of their branding efforts, featuring logos or unique designs that promote community identity. This not only beautifies the area but also fosters a sense of belonging among residents, creating a strong community spirit.