“high-helix drill”的概念、定义、翻译、参考文献-科学参考

单词	high-helix drill
释义	high-helix drill [`hī ´hē·liks ´dril] ^{DESIGN ENGINEERING} A two-flute twist drill with a helix angle of 35-40°; used for drilling deep holes in metals, such as aluminum, copper, hard brass, and soft steel. Also known as fast-spiral drill.
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