有些工程施工时,要求做黑板或壁式宣传栏。我们根据做灰线的原理,采用模型操作,使板框、栏板都取得较完美的效果,尤其是宣传栏的边框,当水泥砂浆全部干硬时,按线条刷上各色油漆,更显得别具一格,而且,工效快,工序简单。具体做法是,按一般抹水泥灰的 Some construction projects require blackboard or wall billboards. According to the principle of gray line, we use model operation to make the plate frame and the fence board have more perfect results, especially the border of the bulletin board. When the cement mortar is all dry and hard, press the lines to paint the colored paint to make it more unique. And, ergonomics are quick and the process is simple. The specific approach is to press the cement ash