彩色铅笔通用PPT模板.pptx

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STAS 4976-1966 《制作铅笔的椴木板》.pdf

JIS S 6006-2007 Pencil coloured pencils and leads for them《铅笔、彩色铅笔及其笔芯》.pdf

SNI 12-0512-1989 Writing pencils and technical drawing pencils 《写字铅笔与技术绘图铅笔》.pdf

CNS 552-1981 Pencils《铅笔》.pdf

C0055200_866 Pencils《铅笔》.pdf

GB T 26704-2011 铅笔.pdf

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