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process for the manufacture of spannbetonrohren, in accordance with the procedure established spannbetonrohr and device to perform the process
process for the manufacture of spannbetonrohren, in accordance with the procedure established spannbetonrohr and device to perform the process
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机译：司宾贝通罗尔的制造工艺，按照建立的司宾贝通罗尔的程序和执行该工艺的装置
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for the manufacture of longitudinal and hohlkörpern ringrichtung prestressed concrete, especially spannbetonrohren is a schalungsform (20) from a innenform (21) and a außenform (22). the innenform (21
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