Meanwhile, the control of air flow, furnace negative pressure and primary air flow are introduced.
同时也介绍了送风量、炉膛负压和一次风量的控制。
Negative exterior influence is the primary cause of environmental pollution.
负外在效应是造成环境污染的一个重要原因。
Negative exterior influence is the primary cause of environmental pollution.
负外在效应是造成环境污染的一个重要原因。
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