F22B 21/007
Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being
Official title: {specially adapted for locomotives}
F22B21/007 (Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being) appears on 0 US grants and 1 published applications in this corpus.
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