A、砂的粗細(xì)程度按細(xì)度模數(shù)分為粗、中、細(xì)三級
B、砂的粗細(xì)程度按細(xì)度模數(shù)分為粗、中、細(xì)、特細(xì)四級
C、砂的細(xì)度模數(shù)范圍:粗砂3.7~3.2;中砂3.1~2.2;細(xì)砂2.1~1.6;
D、砂的細(xì)度模數(shù)范圍:粗砂3.7~3.2;中砂3.1~2.2;細(xì)砂2.1~1.6;特細(xì)砂1.5~0.7。
E、砂的細(xì)度模數(shù)范圍:粗砂3.7~3.1;中砂3.0~2.3;細(xì)砂2.2~1.6;特細(xì)砂1.5~0.7。