ข้อมูลGAS-HOLDERS OF VARIABLE CAPACITY (self-acting gas cut-off devices A47J0027620000, G05D; flame traps A62C0004000000; gas mixers B01F, F16K0011000000, G05D0011000000; construction or assembling of bulk storage containers employing civil-engineering techniques E04H0007000000; gas compressors F04; valves F16K; damping pulsations in valves or pipes F16K, F16L; pipes F16L; stopping devices for gas mains F16L0055100000; vessels adapted for storing compressed, liquefied, or solidified gases F17C; gas distribution systems F17D0001040000; detecting leakage F17D0005020000, G01M; supervising or alarm devices F17D0005020000, G08B; control of combustion in burners F23N; gas flow or pressure regulators G05D)

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