China is expected to launch a new energy- efficiency standard for home air conditioners, enhancing the threshold from th......

主要通过调整琉璃瓦釉料配方来降低其成本。主要方法是在琉璃瓦能够达到各项性能指标的条件下用铅硼熔块来代替部分铅丹，从而减少铅......