An instrument for finding position of slope stakes, and to aid in calculating cross-sections for preliminary estimates. Description taken from The Compass. (See also Eng. News. Sept. 12, 1891, p. 231.)
Slope stake setter and universal slope indicator for railroad construction
Ry Rev
1891
Article (Journal)
English
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Visual Approach Slope Indicator
Emerald Group Publishing | 1962
Visual approach slope indicator
Engineering Index Backfile | 1962
NTIS | 1983
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