认为
发表于 2025-3-26 22:53:24
http://reply.papertrans.cn/24/2398/239724/239724_31.png
CESS
发表于 2025-3-27 04:38:18
Manfred Peritsch colleagues found the solution in the provision of a ball-point in which the ball rested on a base seat intersected by feed channels and the employment of a reservoir consisting of a tube in which the ink was maintained as an uninterrupted column by capillary forces.
conspicuous
发表于 2025-3-27 09:09:59
http://reply.papertrans.cn/24/2398/239724/239724_33.png
痛打
发表于 2025-3-27 11:45:56
http://reply.papertrans.cn/24/2398/239724/239724_34.png
肮脏
发表于 2025-3-27 13:50:52
http://reply.papertrans.cn/24/2398/239724/239724_35.png
Vsd168
发表于 2025-3-27 21:01:07
http://reply.papertrans.cn/24/2398/239724/239724_36.png