Reel up and down的意思|示意

When the pull line is pulled or loosened, the reel can rotate positively and reversely, which drives the screen curtain to roll up or fall down.

拉动或松开拉线，卷筒可正、反向转动，带动纱帘卷起或落下。

In the process of up and down the tubing, the operating handle of the reel is always in the lift position, so that the coiled tubing can tightly wound on the reel.

在起下油管过程中，滚筒操作手柄始终处于上提油管位置，以使连续油管紧紧地缠绕在滚筒上。