It need not be thought of silting when medium and small sized water convey canal were designed because of little water drawing and sand quantity.
阐述了中小型输水渠道设计时，由于水库取水含沙量较小，不需要考虑淤积问题。
The formation of fly sand is determined by the quantity of the liquid phase of clinker and the property of the liquid phase (the surface tension mainly).
飞砂产生与否主要取决于熟料液相量和液相性质（主要是表面张力）。
Since the sand shell modeling production of the hull casting cannot meet the needs required, this project adopts low-pressure foundry techniques to improve the internal quantity of products.
由于型号弹上产品中壳体类铸件的砂型铸造生产不能满足要求，项目通过采用低压铸造工艺方法提高了铸件产品的内部质量。
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