The conventional artist would now unpin the drawing from his board, take it into the hall and spray it with fixative, then roll it up and put it in a mailing tube.

传统画家这时要将图画从图板上取下，拿进大厅，喷定色剂。然后将它卷起来，放进邮寄用的纸筒。

youdao

They built it using parts such as a SkyWalker X8 mini airplane with an Ardupilot navigation, a Quantum RTR Bomb System, a mailing tube and other 3D printed parts.

FORBES: Burrito Bomber Drone Parachutes Carnitas To Doorstep