旧砂再生
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soft reclaimed used sand 软再生
used sand reclaimed
废砂回收
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The causes that residual catalysts affect the curing velocity and cured strength of used sand bonded with furan resin and reclaimed furan sand were studied and discussed deeply.
就残留催化剂和其分解物影响呋喃树脂旧砂及其再生砂的固化速度和固化强度的原因作了较深层次的研究和探讨。
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