DP 2 、 D 4 are mainly used for ramming sand core of small mould in foundry practice , whereas.

D4型气动捣固机,主要用于铸造行业捣固砂芯或小砂型.

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Therefore the usage of waterglass foundry practice couled be reduced to 1.5 % or less.

如果生产中使用此改性水玻璃,水玻璃用量可降到1.5%及以下.

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