材质PETG 打印需要支撑 所使用的弹簧来自己圆珠笔，在按装弹簧时如果在上栓不能完全扣到槽里

就可以适当剪短弹簧长度。发射目标可以用小纸团！

我的B站有视频资料，可以一起玩！https://m.bilibili.com/space/510717935

Material PETG printing requires the support of the spring used for its own ballpoint pen. When installing the spring, if the bolt cannot be fully fastened into the slot
You can appropriately shorten the length of the spring. Launching targets can be done with small paper balls!
My Bilibili has video materials, you can play together! https://m.bilibili.com/space/510717935