| 摘要 |
The nozzle includes flame keeper (2) mounted at the front of nozzles (1,1'), wings (3,3') slantingly attached at the outer of nozzle, frame (5) formed in periphery of nozzle, small holes (4,4') and hole (9) perforated in the center of the nozzle, cylinders (10,10') connected between gas pipe (8) and flame keeper and moved by lever, and gas pipe and nozzle body (11) movably connected by screw.
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