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En la excavacin de una galera de mina subterrnea, con un macizo rocoso tipo I b (RMR 83) Qu sostenimiento aplicara? Select one: A. Perno
En la excavacin de una galera de mina subterrnea, con un macizo rocoso tipo I b (RMR 83) Qu sostenimiento aplicara? Select one: A. Perno local en bveda y Shotcrete en bveda de 5 cm. B. Perno sistemtico y malla electrosoldada en bveda y Shotcrete de 10 cm en bveda y 3 cm en hastiales. C. Innecesario, pernos ocasionales si lo amerita. D. Ninguno de los anteriores
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Saxon Algebra 1/2 An Incremental Development, Test Forms
Authors: Saxon Publishers
3rd Edition
9781591411734, 1591411734
