The traditional control methods are most on the basis of the independent and definite models which is smooth demanding rate process in single company and it is difficult to apply in wide range.
传统的控制方法针对确定需求的库存问题，在连续均匀的情况下探讨单个企业的控制策略，研究的对象主要针对订货过程和生产过程，应用范围相当有限。
The blast ring and charging hopper of a cupola was modified. As a result, the break down rate and maintenance cost was obviously decreased, and the melting process became more smooth.
对冲天炉风圈、加料漏斗的技术改进，使冲天炉的故障率明显降低，维修费也大大下降，很好地保证了熔炼工序的顺利进行。
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