... coal pneumatic separation || 风力选煤 coal preheating || 煤料预热 coal preparation plant || 选煤厂， ...
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coal preheating processes 煤预热处理
coal preheating process 煤预热工艺
Pulverized coal preheating 煤粉预热
coal preheating pro-cess 煤预热处理
coal preheating unit coal preheater 煤预热装置
Submerged nozzle must be preheated before casting. Now, burning the coal gas is the usual preheating method.
浸入式水口在浇钢以前必须进行充分预热，利用燃烧的煤气烘烤水口是常用的预热烘烤方式。
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