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Hydraulic archer

Architectural characteristics of arched roof produced by hydraulic archer: Hydraulic archer has light weight, strong rigidity, good elasticity and excellent seismic performance. Hydraulic archer has reasonable force bearing method, safe…

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Shutter doors

The roller shutter door (roller gate) is a series of multi-joint movable door pieces connected together in a fixed slideway, and the upper and lower doors are rotated around the…

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