Ceiling, and equipment constructed of appropriate materials, and designed with sanitation in mind. No design flaws present that compromise product quality. Adequate drainage provided.

• 良好的:地面、墙面、天花板和设备均使用合适的材料建造且采用卫生的设计方案。设计上没有危及产品质量的瑕疵。有足够的排水量。