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After adjusting the board so that its center is on the line of sight between two stations , or otherwise ... Having set up at a station and oriented the lower plate by a backsight , take sights to a light held at as many points as ...
Five sets of apparatus are recommended for a station , with a spare set for a single crew of 5 The station should be near ... Joint rescue stations , of which there are several hundred in the US , are best where mines to be served are ...
ANGLE AND SUMMIT STATIONS Angle stations are required for horiz deflections . ... Fig 25 ' shows a simple station , with both pairs of cables anchored ; in it , the carriers detach automatically , but 2 men are required to reattach them ...
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I only have the second volume of this work, and I love it! Found at a local Value Village, it is filled with fascinating information. Details of all aspects of mine engineering, including compressed air, ventilation, and supporting structures. Baca ulasan lengkap
Conditions Methods in General
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