The production process of gray iron with trace antimony addition and its application scope was introduced.
介绍了加微量锑灰铸铁的生产工艺和适用场合。
Experiments show that the methods are effective in application, but each of them has its application scope.
通过实例验证表明了这2种校正方法实际运用效果较好，但各有其适用范围。
Basic characters of reinforcing bar rusty retardant agent, its application scope and method were introduced.
介绍了钢筋阻锈剂的基本性能、使用范围和方法。
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