twist drill
A rotating cutting tool, used for cutting holes in rigid materials, that consists of an essentially conical point, relieved and fluted to form cutting lips, and spiral flutes which direct the chips away from the lips and toward ejection from the hole.
simple past tense and past participle of honeyfugle
(chiefly of text) That is written (and is read) from right to left.
Andes Mountains
機械工は硬化鋼にきれいな穴をあけるためにツイストドリルを選び、その円錐形の先端と螺旋状の溝が切りくずを切刃から素早く外へ導いた。
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DiQt
Free
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