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Chain block is a tool used to pull and hold precast wall panel to facilitate the installation of precast wall panels to be in accordance with the position of the plan.
The drawing of the precast panel wall is done by placing the chain block in a fixed place (on a special reinforced beam), then hooking the end of the chain block hook to the special reinforcement for the removal of the precast panel wall and then withdrawing (the pulley system).
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