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Vintage diagram of a Engineers` Dumpy Level. #250584345
Description
Vintage illustration diagrams showing engineers` Dumpy Level and types of diaphragms. Dumpy level is commonly used leveling instrument to locate the points in same horizontal plane. It is also called as automatic level or builder`s level. Elevations of different points and distance between the points of same elevation can be determined by dumpy level. Spirit level, eyepiece, tangent screw, focussing screw, ray shade clamp, tribrach, wallplate. Webs, platinnum-iridium points, glass stadia. 1900s reference to engineering.
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