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DBB abbr. stresses
O&G, casp.	система двойной блокировки и продувки (Yeldar Azanbayev); манометрическая сборка (Yeldar Azanbayev); сдвоенный запорный клапан со спускным клапаном (Yeldar Azanbayev)
O&G, karach.	двойной клапан со свидетелем (Bauirjan)
oil.proc.	сдвоенный шаровой кран со спускным устройством (erodenis)
English thesaurus
DBB abbr.
abbr.	detector back bias; detector balance bias (Vosoni); Director of the Bureau of the Budget; data byte buffer
abbr., el.	data base buffer; data bus buffer; distributed bulletin board
abbr., exhib.	double beds with bath
abbr., insur.	Deals, boards and battens
abbr., logist.	deals, battens and boards
abbr., media.	Dynamic Bass Boost
abbr., multimed.	digital baseband
abbr., O&G, sakh.	double block and bleed (valve Yakov)
abbr., proj.manag.	Design-Bid-build
abbr., scottish	Delayed Blowback

DBB: 7 phrases in 4 subjects

Caspian	1
Oil and gas	1
Sakhalin	3
Tengiz	2