Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: EN 352-7:2002
• Năm ban hành / Publication date: 2002
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Hearing protectors Safety requirements and testing Part 7: Level-dependent ear-plugs
• Phạm vi áp dụng / Scope of standard: This European Standard is concerned with level-dependent ear-plugs. It specifies additional constructional, design and performance requirements, methods of test, marking requirements and user information relating to the incorporation of the level-dependency facility