| http://www.w3.org/ns/prov#value | - Sight Glasses SG, Dn 25, for installation between petrol station nozzle and hose assembly, or mounting on the dispenser. for the visual control of bubble-free dispensing and fuel colour (e. g. for premium fuels). suitable for all standardised gasoline and diesel fuels according en 589 + en 590, including ethanol or biodiesel content. fulfill en 13617-1; t??V type approval no. 2310.
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