Design Requirements 2 : The requirements set forth by the manufacturer's engineering authority for materials manufacturing, fabrication, and inspection procedures to be employed in the production of the crane. (Spec 2C)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}