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F22B13/00—Steam boilers of fire-box type, i.e. the combustion of fuel being performed in a chamber or fire-box with subsequent flue(s) or fire tube(s), both chamber or fire-box and flues or fire tubes being built-in in the boiler body
FR1093174D1954-02-121954-02-12
Apparatus for steam production
ExpiredFR1093174A
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