... chain tension adjuster；链的张力调节器 chain tension device；链张紧装置 chain tensioner；链张紧器 ...
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This product mainly comprises driving device, tension device, back-whirling device, driving chain, sliding ramp, I-bean steel track and electrical controller.
主要由驱动装置、张紧装置、回转装置、牵引链条、滑架、工字钢轨道及电气控制等组成。
Tension device for spiral taut, make it easy to adjust the chain.
拉紧装置为螺旋拉紧，使链条调整简单灵活。
Roller Blinds: If the tension device is not attached to the wall or floor, young children may pull the bead chain around their neck, posing a risk of strangulation.
卷轴帘：珠链如果没有用拉紧装置固定在墙上或是地板上，儿童可能会将珠链缠在脖子上，造成窒息的危险。
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