The preparative process of silica sol with natural wollastonite belonged to first origination, Natural resource was used, low cost and good economic benefit were obtained.
2
以硅溶胶型壳熔模精密铸造的工艺过程分析为基础，提出了铸件成本和价格的计算方法。
Calculation method of cost and price of investment castings was given based on analysis of sol silicate mold shell investment casting process.
3
本厂采用全硅溶胶失腊精密铸造工艺。
This factory USES the entire silicon sol to lose the sacrificial precision casting craft.
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