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The concept of a laser level has been around since at least the early 1970s, [2] the original spinning-mirror design laser plane and line level was patented by the late 1980s, [3] and the compact lens-based laser line level (as produced by many tool manufacturers today) was patented in the late 1990s. It was invented by Oscar Soliz in the late ...
This reduces the need to set the instrument base truly level, as with a dumpy level. Self-levelling instruments are the preferred instrument on building sites, construction, and during surveying due to ease of use and rapid setup time. A digital electronic level is also set level on a tripod and reads a bar-coded staff using electronic laser ...
A laser line level is a tool combining a spirit level and/or plumb bob with a laser to display an accurately horizontal or vertical illuminated line on a surface the laser line level is laid against. Laser line levels are used wherever accurate verticals and horizontals are required, typically in the construction and cabinetry industries. Some ...
The term transit theodolite, or transit for short, refers to a type of theodolite where the telescope is short enough to rotate in a full circle on its horizontal axis as well as around its vertical axis. It features a vertical circle which is graduated through the full 360 degrees and a telescope that could "flip over" ("transit the scope").
Bay Area Rapid Transit: Oakland Airport Connector: 22 November 2014: DCC Doppelmayr Cable Car: Cincinnati Airport People Mover: 9 June 1994: Otis Hovair: Detroit People Mover: 31 July 1987: SelTrac [14] DFW Skylink: 21 May 2005: Bombardier CITYFLO 650: DIA Automated Guideway Transit: 28 February 1995: Bombardier CITYFLO 550: ExpressTram: 24 ...
Self-levelling may refer to: Self-levelling suspension; Self-leveling paint; Self compacting concrete; Self-leveling compound This page was last edited on 30 ...