x No Plagiarism!TOowK5l4qOvxZw66DgHYposted on PENANA 原子筆的筆芯放在水下,筆尖會自動朝下,並且整支筆芯會垂直於地面。8964 copyright protection120PENANASg7t6OnV4q 維尼 15.158.61.44ns 15.158.61.44da2