1332636 Mine roof support beams HERMANN HEMSCHEIDT MASCHINENFABRIK 25 Jan 1972 3474/72 Headings E1E and E1P An articulated mine roof support beam 1 mounted on an advancing frame, see Fig. 1 (not shown), consists of two parts 2, 3 which are interconnected by a swivel pin 10 and bridged...
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100X100 200X200 Wide Q235 I Beam H Shape Steel Beam for Roof Support, Find Details and Price about Steel H Beams H Beam Iron from 100X100 200X200 Wide Q235 I Beam H Shape Steel Beam for Roof Support - Zhejiang Zhong Ding Iron and Steel Co., Ltd.
Many old buildings use wooden beams for support.(许多古老的建筑使用木梁来支撑。)“beams” means _. A. roofs B. walls C. pillars D. boards 相关知识点: 基础积累与运用 句子 病句 试题来源: 解析 D。“beams”的意思是“梁、横梁”,与“boards”(木板)在某些方面有相似之处。选项 A“roofs”...
U29 Steel Roof Support Beams Customized U29 Steel Support Mine Supports is mainly used for mining tunnel support ,with the features of high pressure steel structure.Steel support is a kind of passive support for coal mine support. It has high tensile strength a...
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a constant directional radio signal transmitted for the guidance of pilotsalso: the course indicated by a radio beam the main stem of a deer's antler the width of the buttocks … immensely broad in the beam …—Ann Bridge verb transitive verb ...
Ss400 H Section Support Beam for Structural (CZ-H41) Contact Now Quick View 00:15 High Quality Q235 ASTM A36 Carbon Steel H-Beam H Shape Steel Beam Steel Roof Support Beams Contact Now Quick View 00:08 Factory Price Structural Carbon Steel...
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6072. [Class 44] [Also in Group XXX] A device for use in the removal of roof supporting bars or beams, in mines comprises a collar 1 to which is pivoted a lever 3 having one end formed as a cam face 6 and the other provided with a hook 8 for attachment to a pulling device. ...