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。
Each end has to be controlled, therefore one tension device per end is needed.
每根纱线都应单独控制,因此每根纱线都需要一个张力装置。
Each end has to be controlled, therefore one tension device per end is needed.
每根纱线都应单独控制,因此每根纱线都需要一个张力装置。
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