The document discusses the importance of the mechanical engineering industry. Mechanical engineering is central to most manufacturing sectors as it provides necessary machines and technologies. The US, Germany, and Japan have traditionally led the industry, known as the "Triad". Mechanical engineering is a diverse sector comprised of many sub-industries and specializations. Trade unions have historically given mechanical engineering a secondary status compared to industries like automotive and faced challenges in organizing the more skilled mechanical engineering workforce. The International Metalworkers' Federation has recently increased its focus on mechanical engineering through activities and conferences.