headphone
... headphone头戴耳机头戴受话器 headphone头戴受话器 headpiece头戴耳机头盔 ...
head telephone
... 头戴式耳机协定格式 Headset Profile 头戴受话器,头戴耳机 head telephone ; head phone 头戴耳机头戴受话器 headphone ...
head piece
... head phone=headphone 头戴耳机 head piece 头戴受话器 head plate 顶板 ...
headgear
... headfast首系索 headgear头戴受话器 headingaccuracy首向精度 ...