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The tape will pulled less than its standard length when a tension less than the standard tension is applied, making the tape too long. A tape stretches in an elastic manner until it reaches its elastic limit, when it will deform permanently and ruin the tape. The correction due to tension is given by:
Good surveyors will keep track of any circumstance on the path that can influence the accuracy of the distance measured and either measure that portion with an alternative, such as a surveyor's tape or measuring tape, or make a reasonable estimate of the correction to apply. Surveyor's wheels are used primarily for lower accuracy surveys.
The Abney level is an easy to use, relatively inexpensive, and, when used correctly, an accurate surveying tool. Abney levels typically include scales graduated in measure degrees of arc, percent grade, and in topographic Abney levels, grade in feet per surveyor's chain, and chainage correction.
9500 - The 9500 is a black 3.2 oz desktop calculator that uses LR1130 batteries. It has a selectable rounding switch and selectable decimal switch. This calculator also includes 3-key independent memory and is made with 50% recycled plastic. [19] 9700 - The 9700 is a black 9.6 oz desktop calculator with a 12 digit tilted LCD display. It has ...
Following the patent and release of Harold's Long Scale calculator featuring two knobs on the outside rim in 1914, he designed the Magnum Long Scale calculator in 1927. [ 6 ] [ 7 ] As the name "Magnum" implies, it was a fairly large device at 4.5 inches in diameter—about 1.5 inches more than Fowler's average non-Magnum-series calculators. [ 8 ]
The pocket-sized Hewlett-Packard HP-35 scientific calculator was the first handheld device of its type, but it cost US$395 in 1972. This was justifiable for some engineering professionals, but too expensive for most students. Around 1974, lower-cost handheld electronic scientific calculators started to make slide rules largely obsolete.
Correction tape is sold in short spools for hand use, or as long rolls to be used in typewriters, which apply sudden pressure when a key is struck, and can therefore apply the masking material in exactly the same shape and position as the erroneous character. Some versions of correction tape are sold in separate dispensers that are used to roll ...
Friden Calculator Friden Flexowriter. In 1957, Friden purchased the Commercial Controls Corporation of Rochester, New York.This gave them the Flexowriter teleprinter, an electric typewriter capable of being used as part of unit record equipment developed in World War II for the Department of the Navy to automatically type "regret to inform you" letters to the survivors of fallen servicemen ...
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