头垫 meaning in Chinese

head rest
headrest pad

Head restraints for automobile occupants
汽车乘客的护头垫
Oh , yes , sometimes i have to sit up to get my air . propping my head up with three pillows helps a bit
是的，有时候我必须坐起来呼吸。用三个枕头把我的头垫起来很有帮助。
Chucks for machine tools and portable power tools - specification for dimensions of collet pads for base jaws of power operated workholding chucks
机床与便携电动工具用卡盘规范.第3部分:电动工件卡盘的底爪用弹性夹头垫尺寸规范