Electrical apparatus for the detection and measurement of flammable gases. Part 4. Performance requirements for group I1 apparatus indicating a volume fraction up to 100% lower explosive limit
Non-domestic gas-fired convective air heaters, incorporating a fan to transportation of combustion air or combustion products, nominal heat output of up to 300 kW
Electrical apparatus for explosive gas atmospheres. Part 1-1. Flameproof enclosures 'D'. Method of test for ascertainment of maximum experimental safe gap
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