3?1?4水玻璃砂造型（芯）的解決方案182 3?1?5自硬...真空置換硬化（VRH）法 362 4?3?4有機酯水玻璃自硬砂 366...?4?4冷芯盒砂 378 4?4?5樹脂自硬砂381 4?5油砂...
