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1. To connect in parallel a group of amplifiers to a common input. 2. A seismic record produced with the amplifiers bridled; see parallel record. 3. An arrangement for towing a seismic streamer. 4. The insulation-covered lower portion of the cable to which a logging tool is connected. 5. A long electrode often attached to the logging cable suspended some distance (perhaps 100 ft) above an electrical logging sonde or hung just below the casing; see downhole ground. Used as the reference electrode instead of the more usual arrangement of having the reference electrode at the surface; especially used in the case of bad SP interference from electrical surface facilities or telluric currents. Also called a bridal.

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