Glossary entry (derived from question below)
English term or phrase:
top fitting
Portuguese translation:
ajuste automático do zero
English term
Brazil
LAW, Industrial Machinery, IT - 22yrs
Native in: Portuguese
Works in: English to Portuguese, Spanish to Portuguese, French to Portuguese
top fitting
X1.3.1 Burets of glass with an automatic zero top fitting provide accurate, efficient and convenient measurement
Proposed translations
Brazil
Helping You Reach the Brazilian Market
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese
ajuste automático do zero
top pode ser omitido, pois o zero da bureta é no topo.
https://www.google.com.br/search?safe=active&ei=giinWuTWFc6u...
https://en.wikipedia.org/wiki/Burette
Brazil
IT Specialist • M.A. in Linguistics
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Spanish to Portuguese, Portuguese to English, and 1 more.
dispositivo de zero automático na parte superior
http://www.ebah.com.br/content/ABAAAg2bIAC/introducao-as-aul...
Atualmente existem buretas semi-automáticas que possuem um reservatório que facilita o seu enchimento, providas ainda com um dispositivo de zero automático
Brazil
32 years engineering/law/contracts
Native in: English (Variant: US) , Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Portuguese to English
sem perda de pressão / sem conexões que podem gerar perda de pressão
Norway
Salvador Scofano and Gry Midttun
Engineer:Oil&Gas/Electron/Finan/Law/HSEQ
Native in: Norwegian , Portuguese
Works in: English to Portuguese, Norwegian to Portuguese, Portuguese to Norwegian, and 19 more.
conexão de topo
Ref.
https://por.proz.com/kudoz/english_to_portuguese/mechanics_m...
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