Warning: file_put_contents(/www/wwwroot/ppbbbu/5356789.com/cache/a07848cfb3de48180e7dc6e326133172.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/5356789.com/index.php on line 55 safe overhead clearance是什么意思，safe overhead clearance的翻译，safe overhead clearance音标、读音、用法和例句_零六五六深蓝词典
The electric clearance check of tower head is an important measure to ensure the safe operation of overhead transmission line. 塔头电气间隙校核是保证架空输电线路安全运行的重要措施。