sand frame

Nowadays, abaci are often constructed as a wooden frame with beads sliding on wires, but originally they were beads or stones moved in grooves in sand or on tablets of wood, stone, or metal.

如今，算盘往往建造在电线与滑动珠子木框架，但是最初他们是珠子或石头，在沙槽移动或木材，石头或金属片。

When hardwood cutting, it could improve the survival rate to eighty-five percentage by using cuttage stored in sand, frame culture and vermiculite.

在硬枝扦插时，采用插条冬季沙藏、早春温床催根、以保温性好的蛭石做扦插基质等措施能使扦插成活率提高到85%；

Andesite: Has the gauge frame, original Pi Zhu, the original pyrrosia lingua lantern, the sand blasting board, the building stone material and so on.

安山岩：有规格板、原皮柱、原石皮灯笼、喷砂板、建筑石材等。