legal doublet(В юридическом английском – использование пар (практически синонимичных) терминов для описания одного понятия, действия и т.п. (law and order, aid and abet, part and parcel). Более широкое понятие – legal binomial CopperKettle)
sealing steam(Sealing steam is as the name says – it provides a seal for turbines that exhaust into a vaccum condenser, hence creating a better vaccum, and preventing non condensables from entering the system. Sealing is of two type say positive sealing and negative sealing used for perffect sealing positive used in hp side and negative in lp side. answers.comAlexander Demidov)
