muff

• Safety requirement : hardhats , safety glasses , dust mask , face shield , ear muff , and etc
  必须佩戴下列个人防护用品：安全帽、安全眼镜、面罩、防尘面罩、护耳器等
• Hearing protectors - general requirements - part 3 : ear - muffs attached to an industrial safety helmet
  听力保护器.一般要求.第3部分:固定在工业用安全头盔上的耳罩
• In the meantime fauchery decided that the moment had come in which to risk giving count muff his invitation
  福什利认为现在该是邀请缪法伯爵的时候了，不妨试试看。
• Thank you , bethy dear . jo , dear , could you get my muff ? i have a surprise for you
  妈妈：谢谢你，亲爱的佩丝。乔，亲爱的，你能把我的手包拿过来吗？我要给你一个惊喜。
• Hearing protectors - safety requirements and testing - part 4 : level - dependent ear - muffs ; german version en 352 - 4 : 2001 a1 : 2005
  听力保护器.安全要求和试验.第4部分:依据声级的耳机护
• Hearing protectors - safety requirements and testing - part 6 : ear - muffs with electrical audio input ; german version en 352 - 6 : 2002
  听力防护器.安全要求和检测.第6部分:带电子音频输入
• Hearing protectors - general requirements - part 3 : ear - muffs attached to an industrial safety helmet ; german version en 352 - 3 : 2002
  听力保护器.一般要求.第3部分:固定在工业防护帽上的
• Acoustics - hearing protectors - measurement of effective sound pressure levels for level - dependent sound - restoration ear muffs
  声学.听力保护器.电平相关声音恢复耳罩的有效声压级测量
• Hearing protectors - safety requirements and testing - part 5 : active noise reduction ear - muffs ; german version en 352 - 5 : 2002 a1 : 2005
  听力防护器.安全要求和检测.第5部分:有源降噪耳机护套
• Avoid prolonged use of walkman or discman . avoid turning the volume too high . use ear muffs when working in a very noisy environment
  避免长时间收听耳筒收音机或录音机，音量亦应调较至中度或以下。