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  2. Level (optical instrument) - Wikipedia

    en.wikipedia.org/wiki/Level_(optical_instrument)

    Level (optical instrument) A level is an optical instrument used to establish or verify points in the same horizontal plane in a process known as levelling. It is used in conjunction with a levelling staff to establish the relative height or levels (the vertical separation) of objects or marks. It is widely used in surveying and construction to ...

  3. Levelling - Wikipedia

    en.wikipedia.org/wiki/Levelling

    Levelling. A wooden tripod holding an optical level is set up firmly on the ground. Levelling or leveling (American English; see spelling differences) is a branch of surveying, the object of which is to establish or verify or measure the height of specified points relative to a datum.

  4. Spirit level - Wikipedia

    en.wikipedia.org/wiki/Spirit_level

    A spirit level, bubble level, or simply a level, is an instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb). Two basic designs exist: tubular (or linear) and bull's eye (or circular). Different types of spirit levels may be used by carpenters, stonemasons, bricklayers, other building trades workers ...

  5. Tripod (surveying) - Wikipedia

    en.wikipedia.org/wiki/Tripod_(surveying)

    Tripod (surveying) A surveyor's tripod with a shoulder strap. The head of the tripod supports the instrument while the feet are spiked to anchor the tripod to the ground. A surveyor's tripod is a device used to support any one of a number of surveying instruments, such as theodolites, total stations, levels or transits.

  6. Level staff - Wikipedia

    en.wikipedia.org/wiki/Level_staff

    Level staff. A level staff, also called levelling rod, is a graduated wooden or aluminium rod, used with a levelling instrument to determine the difference in height between points or heights of points above a vertical datum. When used for stadiametric rangefinding, the level staff is called a stadia rod.

  7. This election is so divisive, some companies have gone silent ...

    www.aol.com/election-divisive-companies-gone...

    The video starts with a mash-up of some of the biggest sports stars, including LeBron James and Naomi Osaka, and ends with them wearing shirts emblazoned with “VOTE.” Nike wasn’t alone.

  8. Laser level - Wikipedia

    en.wikipedia.org/wiki/Laser_level

    Laser level. A rotary laser level set up and used to level sand fill in trenches. The graduated staff is leaning on the pile of sand. In surveying and construction, the laser level is a control tool consisting of a rotating laser beam projector that can be affixed to a tripod. The tool is leveled according to the accuracy of the device and ...

  9. Pinewood derby - Wikipedia

    en.wikipedia.org/wiki/Pinewood_derby

    The pinewood derby is the wood car racing event of the Cub Scout Program of the Boy Scouts of America. Pinewood derbies are often run by packs of the Cub Scouts program. With the help of adults, Cub Scouts build their own unpowered, unmanned miniature cars from wood, usually from kits containing a block of pine wood, plastic wheels, and metal axles.