A. transfer a pennant wire to the anchor handling vessel B. clean chain as it is hauled into the rig C. lower spring buoys into the water D. retrieve an anchor after the buoy has been lost
A. 100 B. 50 C. 20 D. 10
A. 正确 B. 错误
A. 资质许可证书 B. 营业证书 C. 执业许可证书 D. 从业证书
A. 变比作动筒 B. Y/D伺服作动筒