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介绍应用长管法和激光技术分别对伞喷喷油嘴喷油规律和喷雾特性的测试结果。结果表明，伞喷喷油嘴的喷油特性与传统的多孔喷油嘴的喷油特性大不相同。
The application of the long tube method and the laser technology to the test results of the law of the fuel injection and the spray characteristics of the umbrella nozzle are introduced respectively. The results show that the injection characteristics of the umbrella nozzle are quite different from the injection characteristics of the traditional porous nozzle.