x No Plagiarism!mjPDccPv238EkV9HLr6Yposted 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 protection291PENANAG8mPAbwgtq 維尼216.73.216.45ns216.73.216.45da2