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To eliminate cracks in the casting, the hollow sand core is applied.
为消除铸件中出现的开裂现象, 采用中空型芯以增加铸型的退让性.
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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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