plastic cutter
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主要结果和结论：设计制造出速滑刀金属研磨平板、勾刃冰刀金属研磨棒。
Metal grinding flatbed for speed skate blade and metal grinding rod for figure skate blade were designed and developed.
youdao
勾刀 gōu dāo ㄍㄡ ㄉㄠ
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