SELF-DRILING TAPPING SCREWS 自攻自钻螺钉 ; 自钻自攻螺钉
driling machine vice 钻床虎钳
People with narcolepsy should avoid situations in which a sudden sleep attack might be dangerous . this includes actiities like driling , skiing , and operating machinery or power tools.
嗜睡者在开车、滑雪、运转机器或动力设备的时候应避免突然入睡，否则会招致危险状况的发生。
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