作者: Anthony T. Villelli
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摘要: To protect sprinkler system risers and supply pipes from accidental or vandalistic damage, in an extremely simple economical manner, a fork-shaped element is pounded down straddling relationship around each riser the associated pipe joint. The legs of fork are thus on opposite sides joint, whereas hollow body encompasses restrains riser. may be economically manufactured single sheet metal, with tubular diametrically-opposed parallel adapted to straddle joint horizontal pipe.