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Ships and marine technology. Butterfly valves for use in low temperature applications. Design and testing requirements. Original standard BS ISO 21159-2018 in PDF full version. Additional info + preview on request

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Cigarettes. Determination of selected carbonyls in the mainstream smoke of cigarettes. Method using high performance liquid chromatography. Original standard BS ISO 21160-2018 in PDF full version. Additional info + preview on request

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Metallic and other inorganic coatings. DC magnetron sputtered silver coatings for engineering purposes. Measurement of coating adhesion. Original standard BS ISO 21164-2018 in PDF full version. Additional info + preview on request

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Gas cylinders. Welded steel pressure drums up to 3 000 litres capacity for the transport of gases. Design and construction. Capacities up to 1 000 litres. Original standard BS ISO 21172-1-2015 in PDF full version. Additional info + preview on request

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Submersibles. Hydrostatic pressure test. Pressure hull and buoyancy materials. Original standard BS ISO 21173-2019 in PDF full version. Additional info + preview on request

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Milk - Quantitative determination of bacteriological quality - Guidance for establishing and verifying a conversion relationship between routine method results and anchor method results. Original standard BS ISO 21187-2004 in PDF full version. Additional info + preview on request

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