This paper introduces a using function of MG-150W coal minning machinery, analyses the bearing force condition of minning machinery,points out its specific characteristics and analyses the trouble,finds out destroying cause of the travel wheel of minning machinery,improves the travel unit.

This paper introduces the using function of MG400/9 20-WD coal winning machinery,points out its specific characteristics,and analys es the trouble,improves the cutting unit,travel unit,electrical contro

Objective Discusses the clinical characteristic of the local epidemic viral encephalitis.

The model of "departmental administration" formed under the planning economic system results in separation in the construction and management of soil and water conservation project.

The article discusses department behavior change government behavior and society behavior about maintain management work, assure health develop of highway cause, give play to invest for highway.