原话应该是这样吧：chemical compositions shall be base d on the ladle analysis by mill maker and certified mill test rep or ts shall be submitted. [/table]what is a mill test report? a mill test report (mtr) is a quality assurance document in the steelmaking industry that certifies a material's compliance with: appropriate astm standards, applicable dimensions, physical and chemical specifications. 我觉得这里前一个mill maker是指制造商，后一个是工厂合格测试报告吧。mill指的就是工厂的意思，从上面英文来看一般指钢厂 [ ]
