使用领域 楼梯、室外墙(qiang)面、室外地面 | The stairs, outdoor metope, ground outdoor

　　岩石特征 结(jie)构致(zhi)密、质地坚硬、耐(nai)酸碱、耐(nai)气(qi)候性好 | The compact structure, quality of a material is solid, acid and alkali resistant, weather resistant of good