2、 Bricklayer 38. Cement can't be used after three months of delivery. 39. Cement of different varieties and grades can't be mixed. 40. Yellow sand must be river sand, and you can know it by tasting it with your mouth. 41. Wall and floor tiles should be soaked in water for more than two hours, and can only be pasted after drying in the shade. 42. Wall and floor tiles should be bought more than a few pieces, not less, otherwise they are prone to color differences. 43 There can't be two rows of incomplete bricks on one wall 44
II. Bricklayer
38. Cement cannot be used after three months of delivery
39. Cement of different varieties and grades cannot be mixed
40. Yellow sand must be river sand, and you can know it by tasting it with your mouth
41. Wall and floor tiles should be soaked in water for more than two hours, and can be pasted only after drying in the shade
42. Wall and floor tiles would rather buy more than less, otherwise it is easy to have color differences
43 There should be no two rows of incomplete bricks on one wall
44. The tiles should be cleaned immediately after the joint is wiped
45. The ground should be pasted with marble (light color), and the back of the stone should be waterproof