Certificate of EEC pattern approval of a measuring instrument issued by the Secretary of State for Trade and Industry ... to GEC Marconi aerospace Ltd. ... in respect of a gas extractor ...
Great Britain.Department of Trade and Industry.
National Weights and Measures Laboratory.
GEC Marconi Aerospace Limited.
Teddington : National Weights and Measures Laboratory,
1994.
"Reference no: STD 4958"
Caption title.