望：是指从表面观察下所购买的排水板颜色，因为在现在的市场上大部分排水板都是通过再回收废料制作而成，而使用在回收废料制作的排水板颜色看着比较暗，表面也不光滑，材质也不纯，而新材料产出的排水板外观与花纹细腻，质量好的排水板表面发亮。
Wang: it refers to the color of the drain board purchased from the surface observation, because most of the drain boards in the current market are made by recycling waste, while the color of the drain board made from recycling waste looks dark, the surface is not smooth, and the material is not pure, while the appearance and pattern of the drain board produced by the new material are fine, and the surface of the drain board with good quality is bright.
压：是指用适当的力道去挤压所购买的排水板，而回收废料制作的排水板比较脆，也比较弱，而新材料制作的排水板，韧性比较好，硬度也适中，所以如果你购买的排水板又软有比较脆那么有可能你购买的是质量比较次的排水板。
Pressure: it refers to extruding the purchased drain board with proper strength, while the drain board made of recycled waste is brittle and weak, while the drain board made of new materials has good toughness and moderate hardness, so if the drain board you buy is soft and brittle, then you can buy the drain board with lower quality.
折：是指购买排水板时可以适量的弯曲一下排水板，如果比较容易折断，那么这个排水板就比较次，相反则是质量稍微好一些的排水板。
Fold: it means that you can bend the drain board properly when you buy it. If it is easy to break, then the drain board is the second one. On the contrary, it is a drain board with a slightly better quality.
提：是指用手指端一下，排水板质量比较好的比较敦实，一看就比较稳。废料制作的排水板比较软，另外质量差的蓄排水板往往比质量比较好的蓄排水板质轻。
Mention: it means that the drain board with good quality is more compact and stable at the first sight. The drainage board made of waste materials is relatively soft, and the storage and drainage board with poor quality is often lighter than the storage and drainage board with good quality.