减缩发电机效率

[电] reduced generator efficiency

jiǎn suō fā diàn jī xiào lǜ ㄐㄧㄢˇ ㄙㄨㄛ ㄈㄚ ㄉㄧㄢˋ ㄐㄧ ㄒㄧㄠˋ lv4