Reducing expansion stress of the moulding sand and increasing wet tensile strength of moulding sand are the main measures to prevent scab defect.

防止夹砂缺陷的主要措施是降低型砂的膨胀应力和提高型砂的热湿拉强度。

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Reducing expansion stress of the moulding sand and increasing wet tensile strength of moulding sand are the main measures to prevent scab defect.

防止夹砂缺陷的主要措施是降低型砂的膨胀应力和提高型砂的热湿拉强度。

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