Inspecting massive hydroelectric plant pressure pipes, Vernayaz, Switzerland, 1938.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...s_fullsize.jpg
Previously:
HDPE pipe fusion machine - photo and video
Cutting a huge pipe while straddling it - GIF
Large pipe beveler - GIF
Giant pipe bender - GIF
Industrial pipe expansion joints - photo
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