首页 > Term: Dowty roofmaster
Dowty roofmaster
A self-contained, oil-operated steel support for use on a mechanized long-wall face. It has support frames constructed of rigid roof and floor members supported by yielding hydraulic props. Two- and three-prop units are connected alternately to the armored conveyor by means of jacks mounted in the floor members, to carry long and short cantilever roof beams, respectively.
- 词性: noun
- 行业/领域: 采矿
- 类别 一般矿业; Mineral mining
- Government Agency: USBM
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创建者
- ed.young
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(Milwaukee, United States)