Jaws of Life
noun [ plural ] US trademark uk/ˌdʒɔːz əv ˈlaɪf/ us/ˌdʒɑːz əv ˈlaɪf/
救生颚（一种可以切割金属的装置，用于救出车祸被困者）
a brand name for a piece of equipment that can cut through metal and is used to get people out of their vehicles after an accident
Fire fighters used the Jaws of Life to free the trapped victims. 消防员用救生颚救出被困人员。