the reinforcing ring of mine point described consists of longitudinal and transverse bars welded together for use in underground mining galleries, ext.rémitées 1 longitudinal bar 4 formed of round 2 o
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机译:所述的矿点加强环由焊接在一起的纵向和横向钢筋组成,用于地下矿井,外部钢筋1纵向钢筋4由圆形2 o
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