[ad_1] The definition of high-tech manufacturing is vague and varies depending on the industry. It includes products with printed circuit boards or advanced chemical manufacturing. The term originated in the mid-20th century to describe world-changing technologies, but it has evolved over time. Attempts to refine the definition have been unsuccessful due to the variability of […]
[ad_1] Before 1930, firefighters used wooden ladders, but as buildings grew taller, Sam Carbis invented an aluminum fire escape. San Francisco firefighters still use wooden ladders due to safety reasons and build them in-house for $100 per linear foot. The city’s steep and narrow streets and strong winds pose challenges for ladder trucks. Prior to […]
