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| thermal work of open hearth furnace (【技】有关平炉炼钢过程供热的规定与制度。平炉炼钢是高温物理化学过程，由火焰供热，因此可以把平炉看成一个大型高温热工设备。热工制度是平炉重要的操作制度之一。) | |||
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