BS 1042-1.2:1989. Measurement of fluid flow in closed conduits - Part 1: Pressure differential devices - Section 1.2 Specification for square-edged orifice plates and nozzles (with drain holes, in pipes below 50 mm diameter)

BS 1042-1.2:1989. Measurement of fluid flow in closed conduits - Part 1: Pressure differential devices - Section 1.2 Specification for square-edged orifice plates and nozzles (with drain holes, in pipes below 50 mm diameter)

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