How do you make a point on a pencil? Using a sharp blade or sharpener, you carve away the wood surrounding the lead and then some of the lead itself until the pencil's functional core is laid bare. 想想看,你通常怎麽做才能将铅笔削尖一点?你可以使用削刀或是削铅笔机,一步步将铅笔笔心外围的木头削去,让笔尖自然成形。
The utility model provides a trigonal pencil which consists of a pencil core and a pencil body, and is characterized in that the trigonal pencil body is arranged on the periphery of the pencil core. 本实用新型提供一种由铅笔芯和铅笔体组成的三棱铅笔,其特征是:在铅笔芯外围设置一三棱柱形铅笔体。
Performance of a Composite Miniature pH Electrode Made of Pencil Core Modified with Polyaniline 铅笔芯修饰聚苯胺制作微型复合pH电极的性能