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Question:

Are the bridges, bellows and rubber tubes drawn out or are they drawn only? And the bellows are tensioned with the steel strand?

Are the bridges, bellows and rubber tubes drawn out or are they drawn only? And the bellows are tensioned with the steel strand?

Answer:

It is relatively rare, usually corrugated pipe for zinc metal corrugated pipe, the construction unit may be in order to prevent pipe blockage, when pouring concrete, the corrugated pipe with rubber tube, after pouring completed final setting, you can pull out rubber tube. Bellows need not be drawn.
The bellows are buried inside the component and do not need to be pulled out. Through reinforcement, only pre-stressed, without tension bellows. When tensioning anchor is completed, grouting work is necessary.

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