Mining Engineers' Handbook, Volume 2Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 17-7
... sight . First , adjust vert cross - hair to lie in plane perpendicular to horiz axis . Set up and level the instrument . Sight the vert hair on a well - defined point , clamp both plates , and move telescope up and down . If the point ...
... sight . First , adjust vert cross - hair to lie in plane perpendicular to horiz axis . Set up and level the instrument . Sight the vert hair on a well - defined point , clamp both plates , and move telescope up and down . If the point ...
Halaman 17-8
... sight , so that , when bubble is in center , the line of sight is horiz . The two common types are the Y - and the dumpy - levels . In both the telescope is mounted on a vert axis , about which telescope can swing horizontally , and is ...
... sight , so that , when bubble is in center , the line of sight is horiz . The two common types are the Y - and the dumpy - levels . In both the telescope is mounted on a vert axis , about which telescope can swing horizontally , and is ...
Halaman 17-9
... sight . 1.461 , the true difference in elev . Rod reading on Sta A should be This peg adjustment may be applied to line of sight of the Y - level , except that in this case , after target at A has been set at correct elev to define a ...
... sight . 1.461 , the true difference in elev . Rod reading on Sta A should be This peg adjustment may be applied to line of sight of the Y - level , except that in this case , after target at A has been set at correct elev to define a ...
Isi
AND SORTING OF ORES | 15 |
ELECTRIC POWER | 16-1 |
sion Wiring | 19-1 |
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