护膝装置 meaning in Chinese

knee guard

Each hand protectors has a sticky side which can be used to tuck it inside the knee protector
每个护手装置都有一面是可粘贴的，可以把他卷起来放进护膝装置里。
Prity * 3 consists of three parts : a hand protector for shopping , a hand protector for other tasks and a knee protector
Prity * 3是由三部分组成的：一个是购物时的护手装置，一个是做其他任务时的护手装置，还有一个是护膝装置。