The paper presents designing principle, structure characteristic and construction technology of bed rock bench marks.
本文介绍其设计原理、结构特点与施工技术。
Through analysing the parameter, construction, designing principle of MG150PW extremum thin seam coal winning machine. This paper discusses its developing vista in extremum thin seam mining.
通过对MG 150pw极薄煤层采煤机的参数、结构设计原理进行分析，论述在极薄煤层开采中的发展前景。
This paper introduces the construction of the support, major technical parameters, working principle, designing characters and use of fundamental the units.
介绍了液压联接式悬移支架的结构、主要技术参数、工作原理及各主要部件的设计特点和应用情况。
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