Figure 3From: Underwater Laser Welding/Cladding for High-performance Repair of Marine Metal Materials: A ReviewStructure of the (a) first type and (b) second type gas curtain nozzles developed by the author’s group in Southeast University in China [29], and (c), (d) 3D schematic of the drainage device with spiral air inlet developed by South China University of Technology in China [30]Back to article page