PROBLEM TO BE SOLVED: To obtain a hang gun for hydro-blast capable of keeping a visible area well by eliminating steam generated by jetting water under a high pressure.;SOLUTION: Then hand gun for hydro-blast is provided with a cylindrical cover at the tip of a barrel casing so as to surround a nozzle and a vacuum hose for communicating the cover to a vacuum apparatus so as to suck generated steam through the cover.;COPYRIGHT: (C)2002,JPO
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