x No Plagiarism!OFJNFUPRsbYoULmxLRS5posted 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 protection193PENANARZmbnlzZ6t 維尼3.144.81.47ns3.144.81.47da2