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PLOTTING TRAVERSES By protractor and scale . The courses of a traverse should be plotted by a more exact method than may be used for plotting details ; but the latter can usually be plotted safely by protractor and scale .
In all cases , however , the accuracy of those points located by plane table is limited by precision of the plotting rather than of the measurements . In the field the map must be protected from distortion by moisture , so as to ...
Each level is separately plotted at that scale , these maps being kept closely up to date and serving as the main ... Additional maps of same size are plotted at scales of 1 in - 100 , 200 , and 600 ft , with diminishing amounts of ...
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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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