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BS EN 60079-29-4:2010 BSI Standards Publication Explosive atmospheres Part 29-4: Gas detectors — Performance requirements of open path detectors for flammable gases NO…

BRITISH STANDARD BS EN 15617:2009 Non-destructive testing of welds — Timeof-flight diffraction technique (TOFD) — Acceptance levels ICS 25.160.40 NO COPYING WITHOUT BSI…

D EUTSCHE NORM April 2003 Wastewater treatment plants Part 13: Chemical treatment – Treatment of wastewater by precipitation/flocculation English version of DIN EN 12255-13…