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Adjustable steel crest, from crest plank, inside tube, sell son and regulate Luo mother, hand handle, outside tube and scaleboard constitute.On the building land, application origin practical new replace existing make template to prop up a piece by the wood pillar or the scaffold, attain thus safety, fast install with dismantle to unload the purpose that the template prop up a piece, have acceptance dint balanced, loading the dint strong characteristics, and, can at will regulate to prop up height, with orientation dissimilarity construction space of demand