【物理】削尖唱针，非研磨

SHARPENING of styli, otherwise than by grinding

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相关词条

sharpening

SHARPENING

Sharpening

knife-sharpening device

round edge slip sharpening stone

spiral bevel milling cutter head sharpening machine

SHARPENING of files or rasps by abrasive blasting

hand tool for grinding, buffing, sharpening