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18/30367638...
18/30367638 DC:2018 BS EN ISO ...
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ISO/TS...
ISO/TS 16976-8:2013 Respiratory ...
1.1 ,This specification covers the general requirements for materials used in rubber seals of flat-plate solar collectors, except vertically mounted passive collectors. Particular applications may necessitate other requirements that would take precedence over these requirements when specified.