Jackleg definitions

Jackleg

1) Amateur
Found on https://www.crosswordclues.com/clue/jackleg

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Jackleg

A percussion drill used for drifting or stopping that is mounted on a telescopic leg which has an extension of about 2.5 m. The leg and machine are hinged so that the drill need not be in the same direction as the leg.
Found on http://www.coaleducation.org/glossary.htm

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Jackleg

A percussion drill used for drifting or stoping that is mounted on a telescopic leg which has an extension of about 2.5 m. The leg and machine are hinged so that the drill need not be in the same direction as the leg.
Found on http://www.rocksandminerals.com/glossary.htm

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