(CASE hidden_trouble_level WHEN '1' THEN 'I级' WHEN '2' THEN 'II级'WHEN '3' THEN 'III级'end) as hidden_trouble_level,
(CASE hidden_trouble_type WHEN '1' THEN '漏气' WHEN '2' THEN '腐蚀'WHEN '3' THEN '裂缝' WHEN '4' THEN '设备故障' WHEN '5' THEN '安全距离不足' WHEN '6' THEN '管道承重'WHEN '7' THEN '其他'end) as hidden_trouble_type,