underwater bed下游河床
underwateradj.在水中生长的;水下的adv.在水下
underwater laser radar水下激光雷达
underwater mobile node水下移动节点
underwater environment水下环境
underwater pile driver水下打桩机
underwater maintenance水下保养
underwater sonar array水下声纳阵
underwater positioning水下定位
underwater measurement水下测量
underwater camera lens水下摄影物镜
underwater towed craft水下拖曳器