Water well drillers sink wells into the earth to tap natural water supplies. They drill agricultural wells for irrigation, commercial or industrial wells, and wells for homes that are not served by municipal water sy.
[pdf] In this video we assemble a DIY micro drill rig (tiny DC motor + drill bit + frame) and a submersible water pump, then test drilling a small “well” and pumping water through tubing. I explain the mechanism, torque limits, and 3 upgrades for better performance.
[pdf] Articulated haulers function as heavy-duty dump trucks that move large amounts of materials around or off construction sites. Articulated haulers differ from other types of dump trucks because they feature a pivo.
[pdf] 
