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1 quarter octagon drill rods
буровая сталь квадратного сечения с закругленными углами.English-Russian dictionary of terms for geological exploration drilling > quarter octagon drill rods
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Architecture and Civil Engineering — ▪ 2009 Introduction Architecture For Notable Civil Engineering Projects in work or completed in 2008, see Table (Notable Civil Engineering Projects (in work or completed, 2008)). Beijing was the centre of the world of architecture… … Universalium
