A substance, especially an adhesive agent such as wax or putty, used to close or secure something or to prevent seepage of moisture or air.
封口之物：一种物质，尤指似蜡或油灰的粘性剂，用来封闭、保存某物或防止潮气或空气的渗流。
2
For engineering in desert, the key measures for ensuring the safety and operation of engineering facilities are to increase dry density and enhance seepage so as to avoid the high moisture content.
On the back slope water pressure in clay permeability of avoid by all means, time will take high moisture line, and even the water seepage scale expansion and danger.