Locking bar system, for heavy doors the rod is supplied undivided. Both ends can be connected to the gear mechanism. This allows any positioning of the gear casing.
锁拉杆系统，重型门用。交货时拉杆不分开。两端可与齿轮机构连接，这样便于齿轮壳的任何定住。
If the locking cap is closely screwed, the clutch can be fixed with the rotary rod in a whole. Thus, the clutch can stay in any position of the rotary rod.
旋紧锁紧帽，离合器可与转杆固定为一体，使离合器自身停留在转杆的任意位置上。
With the upgraded locking device the axial force of the screw rod is reduced by half when roiling, Which makes the drum locked more reliably.
轧制时丝杆轴向受力减小一半，使转鼓被锁紧得更可靠。
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