Certificate pursuant to section 12 of the Weights and Measures Act 1985 ... the Secretary of State for Trade and Industry hereby certifies as suitable for use for trade the following pattern of a liquid flowmeter ... submitted by Avery Hardoll Ltd.
Great Britain.Department of Trade and Industry.
National Weights and Measures Laboratory.
Avery-Hardoll Limited.
Teddington : National Weights and Measures Laboratory,
1988.
Weights and measures
Liquid feeders.