Aerospace industry 1 Cutting tools 1 Deep-narrow groove 1 Electrochemical cutting 1 Electrochemical electrodes 1 Electrochemical milling 1 Electrochemicals 1 Electrolytes Electrolytics 1 End faces 1 Flow fields 1 GH4169 alloy 1 GH4169 alloys 1 Interelectrode gaps 1 Machining quality 1 Milling (machining) 1 Narrow grooves 1 Nickel alloys 1 Surface roughness 1 Tubes (components) 1 Wedged end face 1 deep-narrow groove 1 electrochemical milling 1 wedged end face 1