To achieve optimal result, the brim is in floor brick to should be the half of floor brick at least, if be less than one half, but width of brick of floor of reticle translation 1/2.

• 为获得最佳效果，边缘处地板砖至少应为地板砖的一半，如小于一半时，可将十字线平移1/2地板砖宽度。