How It's Made S13E07 · Pressure Cookers, Mechanical Singing Birds, Oceanographic Buoys, Tank TrailersPressure Cookers, Mechanical Singing Birds, Oceanographic Buoys, Tank Trailers

Locking lids and pressure-control valves are fitted to pressure cookers, miniature mechanisms animate mechanical singing birds, scientific instruments are installed in oceanographic buoys, and stainless-steel tanks are fabricated and mounted on transport trailers.