The new muffler device has simple structure,it has lesser effect on the resistance loss of chief ventil...
该消声装置结构简单,通的阻力损失影响小,防尘、防潮及降噪效果明显,可广泛的应用煤矿通的消声降噪。
Recently, some experiments show the existence of prewhirl and reveal the asymmetrical scroll will affect the distribution of prewhirl.
近年来,已有的实验结果显示,离心式通轮进口前的气流预旋确实存在,而且其分布形式与人们通常的想象有很大不同。
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Ventilators are badly needed in developing countries.
发展中国家急需。
Is there something wrong with your air vents?
你家的有问题吗?
They're spending money on protective gear, ventilators, overtime for people at hospitals.
们要支付防护装备、和医院工作人员的加班费。
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