涂料的主要原料是钛白粉和胶水,贮存期稍长便会沉淀,胶水遇冷也会凝结,因此,使用前必须搅匀。尤其在冬季,还要通过加温,甚至要兑开水,经人工搅拌后方可使用。截取一根长650厘米的圆钢,用200×20×3的钢板弯成三个叶轮,将其交叉等距离地焊在圆钢的一端,呈螺旋桨状,见图1。另一端在手 The main raw materials of the paint are titanium dioxide and glue. The storage period will be slightly longer and the glue will condense when cooled. Therefore, it must be mixed before use. Especially in winter, it must be warmed up and even be mixed with water. It can be used after artificial mixing. A 650-cm-long round steel was cut out, and 200×20×3 steel plates were used to bend the three impellers. The cross-equipment was welded to one end of the round steel to form a propeller. See Figure 1. The other end is in hand