baishun prestressing tensioning hydraulic jack scaffolding screw jack
baishun prestressing tensioning hydraulic jack scaffolding screw jack
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Load Verification Testing Systems is used for establishing safe working loads or to validate the correct installation of existing fixings.
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Feb 04, 1975· CONCRETE PRESTRESSING DEVICE ... and two screw nuts 5 in the form of cylindrical washers also formed of steel ... a hydraulic jack 23 with a piston 24, ...
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