影响风幕机（风帘机）效果的因素 风力等级表：自然影响因素 影响风幕机效果的因素 风力等级表：自然影响因素 Factors that influence the effects of an Air Curtain machine Air flow scale : natural factors of influence Air flow scale | Explanation | 风力等级 | （KT） | (m/s) | 说明 | 1 | 0.5-1 | 0-0.3 | Flat calm-smoke curls straight upwards 稳静、烟火袅袅直升 | 2 | 1-4 | 0.3-1.6 | Smoke will weave in a direction 烟会编向 | 3 | 4-7 | 1.6-3.4 | Leaves will move 树叶会动 | 4 | 7-11 | 3.4-5.5 | Branches will move and flags unfurl 树枝会动、旗帜会展开 | 5 | 14-17 | 5.5-8.0 | Sand and dust flies upwards , paper flies 沙尘飞扬、纸会飞、小树枝会摇 | 6 | 17-22 | 8.0-10 | Tree trunks sway and the surface of water ripples 树杆摇动、水面起波纹 |
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