Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
New threaded roof bolts
Use of rock drill drive to insert threaded bolts, 25-27 mm in diam and 0.9-1.6 m long; diameter of bolt is 1-3 mm larger than diameter of drill hole into which it is screwed.
New threaded roof bolts
Use of rock drill drive to insert threaded bolts, 25-27 mm in diam and 0.9-1.6 m long; diameter of bolt is 1-3 mm larger than diameter of drill hole into which it is screwed.
New threaded roof bolts
Novaya shtangovintovaya krep
Belyaev, V.S. (Autor:in) / Sever'Yanov, A.N. (Autor:in) / Genin, M.S. (Autor:in)
1963
3 pages
Aufsatz (Zeitschrift)
Russisch
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