"卷筒纸拉力" can be translated into English as "tension of roll paper" or "pulling force of roll paper".
"Tension" refers to the pulling force transmitted axially through a string, cable, or in this case, roll paper.
"Pulling force" directly describes the force applied to pull or stretch the roll paper.
Both expressions are appropriate depending on the context and the specific aspect of the "拉力" (pulling force) you wish to emphasize.