The holes and defects appear at the top surface of castings during the common plain carbon steel is produced by V-process.
用V法铸造生产普通碳钢铸件易产生氧化缺陷，表现在铸件上表面有麻坑和缺损等。
The holes and defects appear at the top surface of castings during the common plain carbon steel is produced by V-process.
用V法铸造生产普通碳钢铸件易产生氧化缺陷，表现在铸件上表面有麻坑和缺损等。
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