boring
A pit or hole which has been bored. / (usually in the plural) Fragment thrown up when something is bored or drilled.
simple past tense and past participle of grype
A variety of hard glass of fine quality, made in Bohemia. It is of variable composition, containing usually silica, lime, and potash, rarely soda, but no lead. It is often remarkable for beauty of ...
plural of Stanford dragon
地質学者は掘削孔を調べ、異なる土層を記録した。
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