The floors and internal surfaces of the walls of every food room to a height of not less than 2 m are surfaced with smooth light coloured non - absorbent material and the junctions between the walls and floors are coved 米的内墙表面,均涂以平滑、浅色的非吸收性物料,而墙壁与地面之间的连接处则成内弯形;