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single-jacking
Mining
DCHP-1 (pre-1967)
Entry from the DCHP-1 (pre-1967)
This entry may contain outdated or offensive information, terms, and examples.
n.
See quote.
See: double-jacking
Quotations
1964
Single jacking is a [drilling] job where one man handles both the chisel [drill steel] and a small hammer.