简述喷吹罐下部安装流化装置的作用?
参考答案:
(1)使喷煤量连续均匀并提高喷吹煤粉浓度。(2)防止煤粉在罐内壁“挂腊”,积粉自燃。(3)防止煤粉悬料。
把下面句子变成间接引语
1.My mother said to me," I will wait for you after class at the gate."
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2.My English teacher said,"You are a hard-working student."
3.He asked,"Can I help you?"
4.The foreigner said,"Where is the nearest bank?"
5.She said,"Do you agree?"