Yull Brown personally demonstrated the safety of this brown generator, which changed people's fear of famine when hydrogen and oxygen were mixed in a ratio of two to one. Later, a large number of experiments proved that the gas supply speed of hydrogen-oxygen mixture could not keep up with the combustion speed only under the condition of high pressure storage, and it was generally safe because the nozzle design of flame gun was unreasonable. Professor Yule Brown's Brown gas generator is the prototype of water welding machine.
Professor Yule Brown's patented technology in Australia has not attracted enough attention. On the contrary, he was hired by the 52nd Research Institute of China Ordnance Industry Research Institute with a high salary, and the brown generators he produced were exported to Europe and America by Nortel. So China is the earliest water-producing country.