sand-cast tube

Optimization design of new anti-sand sieve tube based on hybrid genetic algorithm

基于混合遗传算法的新型防砂筛管优化设计

We established three systems for effectively preservation of the microorganism resources: sand preservation tube, freeze-dry preservation tube and ultra-low temperature tube systems. Optimum long-term preservation systems for different strains were investigated by determining the indications before and after the storage.

为了对菌种资源进行有效的保管，分别建立沙土管、冻干管和超低温保藏管三个长期保存体系，并通过入库前后各项指标的测定分析得出不同菌株的最适长期保存体系。

Use sand cloth or wire brush to clean both tube and cup to a bright metal.

采用砂布或钢丝刷清除管道和端口,使其显露出光洁的金属色.

The earliest form was a simple bamboo tube packed with sand that was strapped to a spear. Such a weapon would have been able to blind an enemy and give the wielder the advantage in close quarters combat.

它最早的形式是：把装满沙子的竹筒绑在一个长矛上，这样，就可以弄瞎敌人的眼睛，在近距离搏斗中取得优势。

On sand the application of carborundum tube for the determination of decomposition rate of plant residues under field conditions

田间测定植物残体分解速率的砂滤管法

To cure pit collapse with residual soil from granite, what measure can be chose is to backfill with bags of sand and infiltrate steel tube or reinforce steel bar to pin up filler.

处理花岗岩残积土的基坑塌方，宜用砂袋回填并在纵横方向打入钢管或钢筋加固回填体。

Now, There are three kinds of means in the application of sand exclusion by spiral flow, the vortex tube sand exclusion, the sand funnel and the spiral flow in the horizontal pipe.

目前螺旋流在水利上用来进行排沙减淤，主要有以下三种方式：涡管排沙，漏斗排沙和平轴螺旋管流排沙。

The consolidation behavior of the sand drain ground during the process of filling the embankment was monitored by the settlement plate, telescoping tube settlement gauge and pore water pressure cell.

采用沉降板、分层沉降仪、孔隙水压力计等仪器，对路基分层填筑过程中砂井地基的固结规律进行监测，保证了路基的安全填筑。

To fill, cover, or coat with loam. sand-packed tube displacement

充满，覆盖或包有粘砂土砂粒填充管驱替试验

It could improve survival rate of seedlings to chose coarse sand or coarse sand and perlite ( 1 ∶ 1) as media and transplant test tube seedlings in spring and autumn, and the rate was about 90%.

在试管苗移栽阶段，基质选用粗河沙或粗河沙+珍珠岩（1∶1），于春天和冬天移栽，可提高试管苗移栽的成活率，使移栽成活率达到90%左右。