检查你座位下面的安全背心确实在那里。
Check under your seat to be sure the safety vest is actually there.
演练戴紧防毒面具和固定安全背心。
Rehearse the moves of tightening an air mask and securing a flotation vest.
反光衣(反光背心、反光安全背心)可根据客户的需要生产各种款式、颜色和大小的产品。
Reflective clothes (reflective waistcoat, reflective safety waistcoat) according to the needs of customers, produce different styles, colors and sizes of products.
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