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GB910318A
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A prestressed pipe structure of concrete or like material
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GB856262A
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Method and apparatus for making prestressed pipes or similar bodies of concrete or similar mouldable material
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GB838197A
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Improvements relating to concrete or like pipes and joints thereof
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US3034537A
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Prestressed concrete pipes
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US3034536A
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Prestressed concrete pipes
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US3046631A
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Apparatus and method for making prestressed concrete tubular members
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US2911859A
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Method for tapping pipe
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US2842272A
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Pipe-revolving apparatus
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US2829418A
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Apparatus and method for forming a hollow body of concrete or the like
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US2724886A
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Apparatus for forming a hollow body of concrete or the like
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US2772465A
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Apparatus for forming a hollow body of concrete or the like
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US2772466A
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Apparatus for forming a hollow body of concrete or the like
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US2795026A
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Apparatus for forming a hollow body of concrete or the like
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US2863205A
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Apparatus for forming concrete pipes
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IE20638L
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Mould for prestressed concrete pipes
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GB729598A
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Improvements in or relating to a mould for fabricating hollow structures e.g. concrete pipes
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GB705980A
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Improvements in or relating to an apparatus and method for applying a continuous layer of cementitious material to the surface of a vertical structure
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US2686951A
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Mold for fabricating hollow structures
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US2687331A
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Projecting apparatus
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ES197625A1
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A pipe section
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