Cite
MLA Citation
British Standards Institution,. BS EN 593. Industrial valves. Metallic butterfly valves.. London : British Standards Institution, 2019. http://access.bl.uk/ark:/81055/vdc_100105217226.0x000001
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British Standards Institution,. BS EN 593. Industrial valves. Metallic butterfly valves.. London : British Standards Institution, 2019. http://access.bl.uk/ark:/81055/vdc_100105217226.0x000001