Visual Materials
Making Malleable Steel Pressure Pipe at a steel mill - 4th two steps
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Making Malleable Steel Pressure Pipe at a steel mill
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Making Malleable Steel Pressure Pipe at a steel mill - second two steps.
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Making Malleable Steel Pressure Pipe at a steel mill
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Making Malleable Steel Pressure Pipe at a steel mill - third two steps.
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Powerhouse 2a - Making Malleable Steel Pressure Pipe at a steel mill - first two steps.
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Big Creek: Powerhouse No. 2 and 2a (part 3)
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Photographs of Powerhouse 2 and 2A, Part Three. Construction at Powerhouse 2A, images depicting the fabrication of seamless steel pressure pipe [penstock] sections, forging hollow steel blocks into pipe, machining seamless steel pipe sections to proper thickness, pressure testing pipe sections, assembly of penstock sections and valves at Powerhouse 2A.
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Big Creek - Powerhouse #2 & 2a (part 3) [Construction at Powerhouse 2A, manufacturing photos showing the fabrication of seamless steel pressure pipe [penstock] sections, forging hollow steel blocks into pipe, machining seamless steel pipe sections to proper thickness, pressure testing pipe sections, assembly of penstock sections and valves at PH 2A.]
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A construction crew making cement pipe for the waterway at Mill Creek #3 Hydro Plant
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A construction crew making cement pipe for the waterway at Mill Creek #3 Hydro Plant, ca. 1902.
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