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 contents measuring system for road tankers : submitted by Drum Instrumentation Limited
Great Britain.Department of Trade and Industry.
Drum Instrumentation.
National Weights and Measures Laboratory.
Teddington : National Weights and Measures Laboratory,
1987.
Weighing-machines.
Weights and measures