吹叶
吹叶-
1969年人类就登上了月球，可当时我们仍在使用园艺剪，至于电动吹叶机则听都没听过。
Man landed on the moon in 1969 but we were still using garden clippers to trim the edges of the formal gardens and leaf blowers with engines were unheard of .
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结果表明：采用附面层吹吸技术后叶栅的气动性能明显改善，气流转折能力增强，扩散因子增大，总压损失系数减小。
All above shows that the aerodynamic performance of cascade meliorated obviously with the use of boundary layer blowing-sucking technique . The turning ability of airflow increased , the diffusion factor enhanced , and the total press loss-coefficient decreased .