Description of material including material specification, type/grade/class, normal size and material identification applicable.
材料说明包括材料规格、型号/等级/类别、标称尺寸和适用的材料识别号。
Enter a type identification for the property page class; should match the type name.
输入属性页类的类型标识；标识应与类型名匹配。
Enter a type identification for the control class; should match the type name.
输入控件类的类型标识；标识应与类型名匹配。
Introduction to class, system safety, and hazard identification (PDF).
课程介绍，系统安全，和危险确认(PDF)。
Introduction to class, system safety, and hazard identification (PDF).
课程介绍，系统安全，和危险确认(PDF)。
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