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Backrest Iron
Characteristic：
Used to be placed inside the starting well of the top pipe. It is the cornerstone of pipe jacking machine excavation. The forward power of the pipe jacking machine will be fully fed back to the backrest iron. All the "recoil" of the main top oil cylinder can uniformly react on the starting wellbore wall of the top pipe through it.
Used to be placed inside the starting well of the top pipe. It is the cornerstone of pipe jacking machine excavation. The forward power of the pipe jacking machine will be fully fed back to the backrest iron.
