f F holes (提琴上的) F 形孔眼。 F sharp (F#]) 升 F 调。 F = 1.【化学】 fluorine. 2.【生物学】 (generation of) filial offspring; 【植物;植物学】子代 〔F1 杂种子1代; F2 杂种子2代〕; 【动物;动物学】世代 〔cf. f = force〕。 F,F/f, f/,f., f: etc. 见 f-number 条。
" automatic reset n . c . series connected thermal overload protection , two moisture sensing probes , prelubricated shaft bearings and class f insulation . * efficiencies include all mechanical losses including mechanical seals . 自动重置n . c .系列,连接过热保护装置,两个潮气检测探头,预润滑轴承和f级绝缘。 *效率包括所有机械密封中的机械损失。
By starting with the analysis of generator end structure and overheat sources , it is presented that the technical key required to expand the capacity of the unit is to solve the electromagnetic leakage shielding problem . by proceeding with the analysis of the reasons causing the aging of the stator winding bars insulation , the necessity for stator winding bars to adopt class f insulation and relative fixing technological improvement are pointed out so as to extend the service life of the winding bars insulation 从分析发电机端部结构及过热原因入手,提出了增容的技术要点在于解决端部漏磁屏蔽问题;从发电机线棒绝缘老化原因分析入手,指出为延长定子线棒绝缘使用寿命,线棒主绝缘采用f级的必要性以及相关工艺的改进。