yòngtú jiùshì zhège dōngxi nálái zuò shénme zìjǐ yòng sòng péngyou cānjiā huìyì zhǎnshì yàngpǐn wéixiū bèiyòng

用途就是这个东西拿来做什么：自己用、送朋友、参加会议、展示样品、维修备用。

Purpose refers to what this item is used for: personal use, gifting to friends, attending meetings, displaying samples, or keeping as a spare for repairs.