Gauge rod

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a graduated rod, for measuring the capacity of barrels, casks, etc.

See also: Gauge

References in periodicals archive ?
Tenders are invited for Lube Oil Gauge Rod Modified For Wdg4 Locomotives Drg.
During all of these procedures, the evenness of interior and exterior areas was consistently checked with a gauge rod, defective areas were removed and installed again.
The unique look and feel of Tibetan rugs is the result of a handweaving technique in which the yarn is knotted around a gauge rod, row by row.