Description: Length of time that maintenance is performed on an object, including technical, logistical, and internal administrative delays; Name: time for maintenance 
Description: Time interval when maintenance is carried out on an item including technical, logistic and internal administrative delays; Name: Maintenance time
Description: a specific design within the context of a type, which is generally characterized by its dimensions. A construction can comprise several design (variants), which generally vary in terms of mechanical details; Name: Construction form of the seal surface, connection, muff A1