... etching machine 腐蚀制版机 etching needle 蚀刻针 etching paper 腐蚀版印刷用纸 ...
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... 刻针scraping needle 刻针etching needle 刻针，誊写用铁笔needle-pointed stylus ...
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needle etching 针刻
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cutting stylus
Sounds are recorded on ordinary records by etching the vibrations of a needle along a spiraling groove.
通过沿着螺旋槽刻划针的振动，声音被记录到传统的唱片上。
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