Uncontrolled airspace is designated Class F, while controlled airspace below 5,490m above sea level and not in the vicinity of an airport is Class E.
无交通管制的空域被定为等级F，而低于海拔5490米、不在机场附近的管制空域是等级 E。
Therefore, class F amplifier has caused widespread concern at home and abroad, and also has good prospects for the study.
所以F类放大器在国内外已经引起了广泛的关注，并拥有很好的研究前景。
The motor insulation system shall be Class F minimum, utilizing materials and insulation systems evaluated and certified with IEEE 117 classification tests.
电机的绝缘系统至少应该是F级，所采用的材质和绝缘系统经过美国电气和电子工程师协会IEEE 117分类等级测试的评估和认证。
Casting resin used with anhydride hardeners for making insulators and switchgear components of high mechanical strength, for class 'f' Insulation.
与酸酐类固化剂组合的浇铸树脂，用于绝缘体，开关等，有高的机械强度和F级的绝缘性能。
Casting resin used with anhydride hardeners for making insulators and switchgear components of high mechanical strength, for class 'f' Insulation.
与酸酐类固化剂组合的浇铸树脂，用于绝缘体，开关等，有高的机械强度和F级的绝缘性能。
应用推荐