Description: Part of the total active maintenance time required to perform preventive maintenance; Name: active period of preventive maintenance
Description: part of the active maintenance time taken to perform a preventive maintenance; Name: active preventive maintenance time
Description: The norm in fixed relation to the feature being described. This defines the parameters that influence the contents of the correlated feature. Type and number of the norm with issue year and issue month must be given, e.g. DIN ISO 4711:YYYY-MM.; Name: Reference norm of the connection, muff A2