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: combination of letters and/or numbers created by the customer to uniquely identify the product. The ordering process is carried out by the customer under this code; Name: order number of customer