
SPECIFICATION FOR GAS METERS - UNIT CONSTRUCTION METERS OF 6 CUBIC METERS (OR 212 CUBIC FEET) PER HOUR RATING
出版:British Standards Institution

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SPECIFICATION FOR GAS METERS - UNIT CONSTRUCTION METERS OF 6 CUBIC METERS (OR 212 CUBIC FEET) PER HOUR RATING
出版:British Standards Institution
專家解讀視頻