温差越大，无保温管与有保温管伸长量之差越大，则保温层摩擦力越大；

The more pipe have temperature difference, the more pipe elongation and insulation friction.

youdao

温差越大，无保温管与有保温管伸长量之差越大，则保温层摩擦力越大；

The more pipe have temperature difference, the more pipe elongation and insulation friction.

youdao