理化指标：外径×高×厚比表面积孔隙率堆积个数堆积重量mmm2/m3m3/m3个/m3kg/m216×8.0×1.03700.85299136135.625×12.5×1.02280.908150097.838×19×1.2132.50.912720092.550×25×1.5114.20.927107407376×38×2.0900.929342063.5