Kinetic exteriors were enthralling; accuracy bearings, balanced arms

https://fun-wiki.win/index.php/Why_the_Most_Difficult_Designers_Specify_Copper:_Custom_Components_That_Prove_Themselves_Over_100_Years

Kinetic facades were mesmerizing; accuracy bearings, balanced arms, and light-weight steels allow panels respond to wind and sunlight, combining engineering with environmental art.