检查切换阀机械卡滞 80%
检查二次空气阀之前的管路泄露 15%
更换切换阀 5%
https://qc.dianpusou.com/tag/etc%e5%8f%af%e4%bb%a5%e5%8a%a0%e6%b2%b9%e7%ab%99%e5%8a%a0%e6%b2%b9%e5%90%97
检查切换阀机械卡滞 80%
检查二次空气阀之前的管路泄露 15%
更换切换阀 5%
https://qc.dianpusou.com/tag/etc%e5%8f%af%e4%bb%a5%e5%8a%a0%e6%b2%b9%e7%ab%99%e5%8a%a0%e6%b2%b9%e5%90%97