3 The four-way valve pipeline welding on the external machine. When welding, soak the valve body in water to cool it down to prevent the plastic parts inside the four-way valve from melting. How many points would you give for this weld? I use Dun'an four-way valve. Please rest assured about the quality #airpodsjump #Airconditioner #AirConditioningManufacturing #AirConditioningSourceFactory #空调

மூலம் பிரச்சனையை தவிர்க்க இந்த உணவுகளை தவிருங்கள்! 🚫 #HealthyLiving #PilesRelief