地震紧急应急措施
urgent measure for earthquake emergency
附加应急舱底水吸入管
additional emergency bilge suction pipe
压载水舱应急舌阀
ballast tank emergency flapper
应急舱底水泵唧装置
emergency bilge pumping device
应急舱底水吸入阀
emergency bilge suction valve
应急舱底水泄水管系
emergency bilge drain piping system