Practices have proved that quick advancing techniqe is applicable in isolated unmined area Comprehensive top coal caving face.
实,孤岛综放工作面快速推进技术是可行的。
Practices have proved that quick advancing techniqe is applicable in isolated unmined area Comprehensive top coal caving face.
实,孤岛综放工作面快速推进技术是可行的。
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