结果表明型壳的质量和强度得到了提高，成功的生产出了大壳体熔模精密铸件。
The result shows the qualities and strength of the shell are improved, and big-shell investment casting is produced successfully in investment casting.
结果表明型壳的质量和强度得到了提高，成功的生产出了大壳体熔模精密铸件。
The result shows the qualities and strength of the shell are improved, and big-shell investment casting is produced successfully in investment casting.
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