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单词
high-helix drill
释义
high-helix drill
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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更新时间:2025/11/2 12:58:22