It may come as a surprise to you, but there is a really good chance that the town or city you live in offer a service you may not have heard of; an energy audit. Cities and towns all over the country have started doing this, wher
A technique for making structural frames autonomously and with readily available materials. Copper plated steel rods are used to join steel tubes. In this assembly the steel tubes are both structural elements and the tool for forming the joints.