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。
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。
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