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BS 1016-5:1977

Methods for analysis and testing of coal and coke-Gross calorific value of coal and coke
standard by BSI Group, 02/28/1977

BS 2080:1974

Specification for face-to-face, centre-to-face, end-to-end and centre-to-end dimensions of flanged and butt-welding end steel valves for the petroleum, petrochemical and allied industries
standard by BSI Group, 03/31/1986