drill hole
Noun | 1. | drill hole - a hole or passage made by a drill; usually made for exploratory purposes |
单词 | drill hole | |||
释义 | drill hole
Drill Holedrill hole[′dril ‚hōl]Drill Hole(shpur), a man-made cylindrical cavity in a solid medium, such as rock or concrete, with a diameter up to 75 mm and a depth up to 5 m. Drill holes are used to place blasting charges, to anchor supports, and to force water or cement into the surrounding rock. The holes are drilled with hammer drills, electric drills, and other light-duty drilling machines. drill hole
Synonyms for drill hole
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