Authors: PAO, SHUN; HU, CHIEH-CHI; CHANG,ZHI-WEI; WANG, YEN-PO; CHUNG PENG-LIN
Company/Faculty/School: Pu Tai Senior High School
Country: Taiwan
e-mail: eddie@wiipa.org.tw
web: https://www.wiipa.org.tw/
Buttons are added to the hand-pressing place. The nib will be stretched out only when the buttons are pressed; Also, soft material is added between the pen body and the nib.
