The specifications of stone are 1-2 stone, and the sizes are 1-3 stone, 2-4 stone and 05 stone, which respectively refer to 1-2cm, 1-3cm, 2-4cm and 5cm stone.

Because the size of gravel is not consistent, only one range is determined during screening. This range is indicated by 1-2, 1-3, 2-4, and the unit is centimeters, that is, centimeters. For example, 1-2 means that the minimum diameter of this batch of gravel is 1 cm, and the maximum diameter is of course 2 cm.

Extended data:

Commonly used stones:

1. Stone products for road and pavement construction: neat block stones for advanced paving, semi-neat block stones for pavement paving, irregular block stones and conical block stones for paving.

2. Main stone products for bridge construction: flaky, block stone, square stone, coarse stone, decorative stone, etc.

3. Rockfill, masonry and slag that can be used to build earth-rock dams.

4. Others are used for architectural sculpture, such as stone carving, sandstone sculpture, rock mining art, cultural stone, sand products, etc. , can be collectively referred to as the stone. Sculpture, mainly for larger stones, is artificially carved, decorated and even colored.

Baidu encyclopedia-stone