回家度假 » Go home for the holidays 砂型铸造实习 » Sand Casting Practice 哈哈，很简单、、、有纪念意义 » Ha, ha, is very simple, and, there is a commemorative significance ..
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Practice sand casting 砂型铸造实习
Practice indicates that this production process can improve the quality and performance of products and working environment, and it can substitute for conventional sand casting process.
生产实践表明，这种生产工艺对提高产品性能和质量、改善生产环境等起到了一定作用，可以取代传统的砂型铸造。
The compaction rate of the moulding sand is an essential index showing the sand moisture in casting practice.
型砂紧实率是反映铸型用砂含水量的一个重要指标。
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