Class 19 Building materials (non-metallic) non-metallic rigid pipes for building asphalt, pitch and bitumen non-metallic transportable buildings monuments, not of metal.

• 类别19非金属的建筑材料；建筑用非金属刚性管；石油沥青、地沥青及焦油沥青；可移动非金属建筑物；非金属碑。