名词
中文翻译：正常螺纹角度
同义词：
['standard thread angle', 'standard thread pitch', 'standard thread diameter']
例句：
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1. The machine's normal thread angle is 25 degrees.
这台机器的标准螺纹角度是25度。
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2.The engineer measured the normal thread angle to ensure the fit was correct.
工程师测量了标准螺纹角度以确保配合正确。
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3.The tool manufacturer recommends a normal thread angle of 1:10 for precision work.
工具制造商建议对于精密工作，推荐使用1:10的标准螺纹角度。