cover hole

cover hole

[′kəv·ər ‚hōl]
(mining engineering)
One of a group of boreholes drilled in advance of mine workings to probe for and detect water-bearing fissures or structures.
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References in periodicals archive ?
All pontoons shall have a two-inch (2") hole at one end with a two-inch (2") plug to cover hole.
The Midlands, of course, was the industrial forge of heavy metal, and Hetfield dedicated Black Sabbath cover Hole In The Sky to Tony Iommi, who sat in the front row.
Place a plastic lid in bottom of pot to cover hole.
Roof decking had been completed, with plywood sheeting used to cover holes until proper lids were fitted.
Unfortunately, for years, and to an even greater degree in the past two years, hospitals across the state have cut their RN staffing levels, left vacant nursing positions unfilled, and refused to hire contingency staff to cover holes in nursing schedules, thus relying on overtime, either coerced or mandatory, to cover for their lack of nurses.
Why do we have to mortgage this wealth today in order to cover holes in public finances?
Cyprus will request the amount of EUR 11 B for a bailout to recapitalize its bank system and cover holes in its budget, according to sources quoted by the Bloomberg agency.
Solder mask generally isn't put down with enough precision to cover holes on tiny pads, and further, the solder mask would probably mess with the clearance, especially with very small QFNs, Immersion silver finishes may develop corrosion in sealed vias.
Authorities also urged workers of maintenance firms or construction companies to always cover holes or trenches when they are unattended.
cut out, fit the letterbox and prepare to drill the cover holes