grain-size 基本例句 n.粒径;颗粒大小 Controlling the temperature of the bed and the grain-size distribution of the fuel, adjusting the structure of the return valve and installation size etc. can efficiently solve the problems. 通过采取控制床内温度、燃料粒度分布、调整回料阀结构和安装尺寸等措施,可以有效解决循环流化床锅炉回料阀堵塞问题。 cnki