タイトルまたは説明

1. Chemical resistance: It shall not be polluted, corroded by waste water and chemicals, or corroded by decaying substances in soil;
2. Impact resistance: the pipe wall adopts a "U" shape structure, which is impact resistant and pressure resistant. The foundation will not crack even if it sinks, and has strong resilience after deformation, so it has good adaptability to the foundation;
3. Aging resistance: the pipes are usually black, and can withstand direct sunlight during storage and construction;