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Pipes - cast in place (Click on thumbnails to enlarge image) |
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Pipes - cast in place (Click on thumbnails to enlarge image) |
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Collapsible wood form for cast-in-place concrete pipe. Source: Harold E. Babbitt, Sewerage and Sewage Treatment, 6th edition (New York: John Wiley and Sons, 1949), p. 228. |
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