每台加液车辆钢瓶,设计有两级安全阀在超压时起到()。在超压情况下首先打开的()是(),在()失效或发生堵塞时,()启动。()的压力设定点较高。
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发现燃料气带液,下列措施不正确的是()。
A. 加强燃料气罐的脱水
B. 检查燃料气罐的伴热蒸汽是否投用
C. 确认燃料气罐的液位指示正确
D. 提高燃料气的压力
压缩空气经空冷塔后,空气中的水分含量能否增加,为什么?
Traffic separation schemes established by the International Maritime Organization().
A. provide routing and scheduling procedures to reduce shipping delays
B. provide traffic patterns in congested areas,so that vessels can operate without having a separate lookout
C. provide inbound and outbound lanes to promote the safe flow of vessel traffic
D. prohibit vessels carrying hazardous cargoes from entering waters that are environmentally sensitive
当定位基准不利于保证测量精度或不便于测量操作时,可选择合适的()为测量基准。
A. 点
B. 线
C. 面
D. 点、线、面