The under board of dimple drainageplant is makes by high impact polystyrene (HIPS).
钉子型排水板的底板是用抗高冲击及高抗压聚苯乙烯（HIPS）制成。
2
Top dressing, adding soil and sand that trickle through grass and ground cover plants is not just necessary for proper drainage, but for plant and grass health.
追肥，增加土壤和沙，通过种草，地面覆盖植物涓滴不只是适当的排水必要的，但工厂和基层健康。
3
Before you plant, your soil should be tested for drainage and absorbance, and this will also help identify optimal ways to provide irrigation to the area.