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 sunrise111

link 19.05.2007 17:21 
Subject: jack or a clamp.
подземные трубопроводы

Newly cut ends of pipes with higher nominal diameters can become somewhat oval. These cut ends can be rounded out simply by using devices, applied inside the pipe or outside, for example a jack or a clamp.

 Roller

link 19.05.2007 18:28 
Jack = домкрат, разжимает стенки трубы изнутри.
Clamp = скоба (вроде струбцины), надевается наружу и, наоборот, сжимает стенки.

 

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