低-低水位开关
low-low water level switch
低机油压力警报器开关
low oil pressure alarm switch
低机油油面警报器开关
low oil level alarm switch
低燃油油面警报器开关
low fuel level alarm switch
低水温警报器开关
low water temperature alarm switch
高低水位开关
high-low water level switch
高水温警报器开关
high water temperature alarm switch