客船应急出口的宽度应不小于() ["0.5","0.6","0.55","0.45"]
客船上为乘客使用的扶梯与甲板的夹角,一般应不大于() ["30","40","50","45"]
二氧化碳管系,每次特别检验应进行气密试验,试验压力为() ["0.15MPa","0.20MPa","0.49MPa","0.69MPa"]
机舱至少应有()个通向干舷甲板的出入口。 ["1","2","3","若干"]
主机用的燃油,其闪点一般应不低于() ["40℃","50℃","60℃","70℃"]
班安全评估中地测防治水内容主要有哪些?