Atomic clock

src: i.ytimg.com An atomic clock is a clock device that uses an electron transition frequency in the microwave, optical, or ultraviolet reg...

SL Rasch GmbH Special and Lightweight Structures

src: upload.wikimedia.org The SL-Rasch GmbH Special and Lightweight Structures , based in Stuttgart, Germany, specializes in special buildin...

Digital clock

src: sapling-inc.com A digital clock is a type of clock that displays the time digitally (i.e. in numerals or other symbols), as opposed to...

Engraving

src: thegraphicsfairy.com Engraving is the practice of incising a design onto a hard, usually flat surface by cutting grooves into it. The ...

Chess clock

src: www.uscfsales.com A chess clock consists of two adjacent clocks with buttons to stop one clock while starting the other, so that the t...