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| Russian | English |
| гидрораздача труб | hydraulic tube expansion (hpro.com vottaktak) |
| конструкция "без труб в окнах" | NTIW design (Анастасия Леонова) |
| развальцовка труб роликовым инструментом | roller expanding (Andrey250780) |
| разверенная труба | worst tube (In a boiler, there is a tube-to-tube temperature unbalance such that some tubes (so-called "worst tube") operate at a temperature higher than average Nik-On/Off) |