jackhammer

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jackhammer

[′jak‚ham·ər]
(mining engineering)

jackhammer

1. An airhammer.
2.A hand-operated, pneumatic, rock drill.
References in periodicals archive ?
Preserving the entire star would result in additional costs of almost $159,000 - $1,200 for jackhammering the terrazzo compared to $2,500 for saving the entire plaque, said James Sowell, MTA's manager of environmental compliance.