Official classification context
Industry overview This refers to the establishments engaged in the operations except the work-site operations, such as general affairs, financial affairs/ac counting, legal affairs, public information/advertising, management of equipments and materials, buying/raw materials purchase, as the head offices primarily engaged in controlling establishments of equipment installation work, to promote the management of its own enterprise.
Major group context This Major group comprises establishments primarily engaged in direct contracts with the orderers for completing electric structures, telecommunication signal facilities, air -conditioning equipment, water supply -drainage with sanitary equipment, elevator systems, and other machinery and equipment, or the establishments engaged in comple ting similar work by self -construction (construction for the establishment itself) as well as those engaged in subcontracting installation work as a part of work for these machinery and equipment.