Experimental research on thermal performances of down draft kiln
倒焰窑热工特性实验研究
The analysis and treatment of the phenomenon of the down draft of solvents of an extract workshop
浸出车间溶剂倒气现象的分析与处理
Please put down soft ladders before hand at portside and starboard side in middle of vessel for draft checking.
请把左舷或右舷，中处，提前放好软梯以便看水尺。
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