| 摘要 |
A borehole logging system includes a borehole logging tool, a logging tool depth encoder for indicating rate of movement of the logging tool, a moving recording medium, and a recording encoder for indicating the actual rate of movement of the recording medium. The logging rate indicated by the depth encoder is used to provide a signal representative of a desired recording rate. This desired recording rate is compared to the actual recording rate and correction made to the recording rate when there is a variance between such desired and actual recording rates.
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