笔帽子 pen caps 戴帽子 1.(戴上或戴着帽子) wear one's hat; put on one's hat2.
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... Putty-Clay油灰-粘土 Pen Caps笔帽 Eyeball Crust眼球外壳 ...
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Also, the processes by which SSS is made into circlip pen-caps, blind rivets, inner-hexagon screws, hosepipes and hypodermic needles are described.
本文还叙述了SSS钢在制成紧固环，钢笔帽，内六角螺丝，金属软管以及皮下注射针工艺中的应用。
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