Comprehensive consideration, low drawing speed is good to the improvement of internal quality.
综合考虑，低拉速有益于普碳钢方坯内部质量的提高。
The principle and improvement of comprehensive digging equipment are presented.
介绍了综掘机械系统的原理及改进。
The principle and improvement of comprehensive digging equipment are presented.
介绍了综掘机械系统的原理及改进。
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