Thank you for purchasing our langtong series products of heat energy 感谢用户使用朗通系列热能产品！ ！ ！
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Langtong series fuel and gas hot water boilers are high - tech products of heat energy made with introduced german technology and advanced production equipment and fine production technology 朗通系列燃油、燃气热水锅炉是引进德国技术，采用先进生产设备和精细的生产工艺制造的高新热能产品。
