发电机端电压过高有何原因?
参考答案:
(1)、发电机转速过高;
(2)、变阻器调压失灵;
(3)、电抗器气隙过大;
(4)、发电机事故飞车;
(5)、励磁调节器失控。
某信用证上规定以下条款: Applicant: Nissho Iwai Corporation No. 4-5 Akaasaka 2-Chome Mi-Natou Tokyo, Japan Bneficiary: China National Mine Import and Export Corp. Beijing, P. R. China Preadvice: Bank of China, Beijing Branch Full sets of clean on board marine bill of lading made out to order of shipper and blank endorsed and marked freight prepaid and notify applicant.
钢轨按钢种分类有哪几种?