Warning: file_put_contents(/www/wwwroot/ppbbu/4cd.cn/cache/7f8ca3fc95a17a7f53e779cc3ff919c2.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/4cd.cn/index.php on line 55 direct current potential transformer是什么意思，direct current potential transformer的翻译，direct current potential transformer音标、读音、用法和例句_沉淀汉英词典