First, find an edge of a table or preferably a slab of wood, the advantage of this is portability.
首先，找一个桌边，或者一块厚木板的边缘，厚木板的好处在于轻便易携带。
2
Used for the waterproof sealing on concrete wall panel slab ventilation pipes the light weight panel products window and doors of metal products asbestos boards gypsum board wood plastic etc.
用于混凝土墙板、板、风管道的防水密封，金属制品、棉板、膏板、料等轻型板材和门窗的防水、封。
3
Used for the waterproof sealing on concrete wall panel slab ventilation PIP es the light weight panel products window and doors of metal products asbestos boards gypsum board wood plastic etc.