hearth cinder

• 炉灰,炉渣

hearth cinder的用法和样例：

例句

1. The application of this technique widens the use range of cinders and opens up a new way for the cinder from urban industrial boilers to be used as a wall material.
   实施该工艺后，放宽了炉渣使用范围，开拓了城市炉底渣作为墙体轻骨料的利用途径。