锅炉上部设有膨胀水箱，水位自动控制，无压运行，安全可靠，简化了繁杂的报批手续。
An expansion tank is equipped at the top, water level can be controlled automatically, it works without pressure, so it's safe and reliable, tedious report and endorse procedures are simplified.
锅炉上部设有膨胀水箱，水位自动控制，无压运行，安全可靠，简化了繁杂的报批手续。
An expansion tank is equipped at the top, water level can be controlled automatically, it works without pressure, so it's safe and reliable, tedious report and endorse procedures are simplified.
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