Teacher: How can we make this piece into a tube?

"So he has to turn them into a tube to fit."

Now come over to this machine and put your hand into the tube.

Directly she got into the tube, it was completely dark.

Young looked at him with empty eyes for a moment, then stepped into the tube.

She shouted into the tube, but there was no answer.

He suddenly held up his right hand and curled it into a tube.

Hunter took out a knife and cut into the tube.

"Its own weight makes it sink down into the tube."

More precisely, they are putting the boom into a tube.