Make sure outrigger were fully extended and installed on firm pad.
确保外伸支架全部伸出并稳固于地面上.
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Mechanical model for the elastic thick outrigger of roof coal is set up.
建立了顶煤弹性深梁力学模型,分析了顶煤应力分布及顶煤破坏形式.
canoe,
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