Sokkia Engineer's Field Book

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Left page has blue horizontal lines and six vertical columns. Right page has 10 x 10 blue lines with 5th vertical and horizontal line slightly heavier. Red vertical center line. Appendix of 11 tables of conversions, trigonometric functions, and formulae for solving right angles and curves. Hardback cover, 80 leaves, page size 4 1/2” x 7 1/4”.

Sold individually or in a set of 6