underwater bed下游河床
underwateradj.在水中生长的;水下的adv.在水下
Underwater Laboratory水下实验室
underwater simulation水下模拟
underwater foundation水下桥墩
underwater psychology水下心理学
underwater task light水下作业灯
underwater inspection水下检查
underwater rock slope水下岩质边坡
underwater excavation水下开挖
underwater flashlight水下闪光灯
underwater shock test水下爆炸冲击试验