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: total inlet pressure required to ensure there is sufficient margin to maintain the minimum instantaneous inlet pressure with adequate margin above the minimum liquid vapour pressure expected; Name: net positive inlet pressure required