镀锡机组采用不溶性阳极平行布置，带钢边部设置边缘罩，减轻了带钢边缘增厚（白边），保证了镀层的均匀性。
参考答案：对
液化气是通过________的方法使其液化而储存在钢瓶里，钢瓶若放在烈日下曝晒，会通过_______的方式使它的内能增大，具有一定的危险性，因此液化气钢瓶严禁曝晒。
A number of bricks were purchased to build a fireplace, at a cost of 40 cents each, but only
of them were needed. If the unused 190 bricks were returned and their cost refunded, what was the cost of the bricks used to make the fireplace
of them were needed. If the unused 190 bricks were returned and their cost refunded, what was the cost of the bricks used to make the fireplace