Mining Engineers' Handbook, Volume 1Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 17-7
... horiz axis ; ( c ) to make horiz axis perpendicular to vert axis of instrument . ( a ) Bubble tubes . Bring plate bubbles to centers of respective tubes by turning level- ing screws . Turn 180 ° and correct half of apparent error by ...
... horiz axis ; ( c ) to make horiz axis perpendicular to vert axis of instrument . ( a ) Bubble tubes . Bring plate bubbles to centers of respective tubes by turning level- ing screws . Turn 180 ° and correct half of apparent error by ...
Halaman 17-8
... horiz bar rigidly connected to vert axis . The telescope can be taken out of the Ys , turned end for end , and replaced , when testing bubble for adjustment . Dumpy - level has its vert axis , horiz bar , and supports for telescope ...
... horiz bar rigidly connected to vert axis . The telescope can be taken out of the Ys , turned end for end , and replaced , when testing bubble for adjustment . Dumpy - level has its vert axis , horiz bar , and supports for telescope ...
Halaman 17-23
... horiz cross - hair ; for more precise results , it is necessary to observe upper and then lower edge of sun for altitude , and right and left edges for horiz angle . The means of these pairs may be taken as altitude and horiz angle to ...
... horiz cross - hair ; for more precise results , it is necessary to observe upper and then lower edge of sun for altitude , and right and left edges for horiz angle . The means of these pairs may be taken as altitude and horiz angle to ...
Isi
COMPRESSED AIR PRACTICE | 15-2 |
Appli | 15-15 |
Hydraulic Compressors | 15-22 |
Hak Cipta | |
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