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排烟风机 páiyān fēngjī
hydroel.st. smoke extractor exhaust fan
met. flue gas exhauster; fume blower
nucl.pow. exhausting smoke fan
refrig. smoke-ventilating fan
tech. smoke discharge fan; smoke exhaust fan
排烟 风 机: 7 phrases in 3 subjects
Metallurgy4
Refrigeration1
Technology2