The collapsibility of the sodium silicate dolomite sand is controlled by the size, wall, pouring temperature, capacity for sand and draw time of the cast.
证明水玻璃白云石砂的溃散性与铸件的大小、壁厚、浇注温度、吃砂量和打箱时间有关。
3
He cast his net a second time, and draw in an old basket full of sand.