Waterproofing materials in the construction of the protection and leakage after maintenance is also a difficult problem, after any part of the penetrability of the damage.
防水卷材在施工后的保护和漏水后的维修亦是难题，任何部位的贯穿性破损。
People take part of the building method, they form their living space themselves, so the maintenance and protection of the completed park seems to be ensured.
人们参与讨论建造方法，亲自构造属于自己的生活空间，所以完成后的公园的维护工作已得到保障。
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