Working surface; Coal body water injection; Coal dust producing; Coal dust control rule; Preventive measure;

工作面；煤体注水；煤尘产生； 煤尘治理规律；预防措施；

youdao

Working surface; Coal body water injection; Coal dust producing; Coal dust control rule; Preventive measure;

工作面；煤体注水；煤尘产生； 煤尘治理规律；预防措施；

youdao