用激光扫描覆膜砂，当激光功率足够大时，覆膜砂的树脂膜会发生过烧和炭化而失去粘结作用。
The resin films of coated sand will be overheated and carbonized while the coated sand is scanned by the laser with a high enough power, and thus lose the binding effect.
用激光扫描覆膜砂，当激光功率足够大时，覆膜砂的树脂膜会发生过烧和炭化而失去粘结作用。
The resin films of coated sand will be overheated and carbonized while the coated sand is scanned by the laser with a high enough power, and thus lose the binding effect.
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