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Site of new invention ------The Panel Controller Block The panel controller block has a significant effect on the thickness of the slab and horizontal degree. The initial making way : Material :PVC pipe(dia.50mm) , several ties, 42.5 cement , Coarse sand,nails,demolding agent. 1.The PVC pipe be filled according to thickness of floor in the drawings ,next , turn down a nail after the mortar initial setting .(this is very important) 2.After the mortar totally setting, use the blade cut open the pvc pipe. the finial product like below: please noted : Sprinkler maintenance The Panel controller block can be used when reach the intensity. Let the block with a na...