短語詞組短語Head & Hearing Protection 頭部及聽覺保護Hearing protection devices 需使用聽力保護器equipment of hearing protection 聽力防護用品hearing protection equipment 聽力保護設備Hearing protection must be worn 必須佩戴降噪耳機Active Personal Hearing Protection Device 主動式個人聽力保 返回 hearing protection