radiant-type boiler

例句：

1. 1. The newradiant-type boiler is more energy-efficient than the old one.
   新型辐射型锅炉比旧的更节能。
2. 2. Theengineers are working on a radiant-type boiler to improve efficiency.
   工程师们正在研究一种辐射型锅炉以提高效率。
3. 3. The radiant-type boilerwas installed in the factory to heat thebuilding.
   辐射型锅炉被安装在工厂里来加热建筑物。