1.

The pretressed concrete pipes are ideally suited for a pressure range of:

A. 0.6 to 4n/mm<sup>2</sup>
B. 0.5 to 4n/mm<sup>2</sup>
C. 0.8 to 4n/mm<sup>2</sup>
D. 0.10 to 4n/mm<sup>2</sup>
Answer» C. 0.8 to 4n/mm<sup>2</sup>


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