使用功能：左臂牵制右臂，使双臂挥杆动作稳定。
Function: Left Arm hold down The Rignt Arm, Make That swing Action is stabile.
气动加压，阻尼系统，保证加压，顶锻动作稳定。
Pneumatic pressure and damp system can keep the welding in stable process.
本实用新型动作稳定，整形质量一致性好，整形效率高。
The utility model has stable act, good shaping quality coherence, and high shaping efficiency.
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