U.S. Military 4D Printing Market Size, Share, Competitive Landscape and Trend Analysis Report, by Technique (Fused deposition modeling (FDM), Stereolithography (SLA), Selective laser sintering (SLS) and selective laser melting (SLM), Others), by Material (Hydrogels, Thermo-responsive, Photo-responsive, Electro & magneto responsive, Others), by Properties (Self-assembly, Self-repair, Self-adaptability), by Application (Army, Navy, Air Force): Opportunity Analysis and Industry Forecast, 2030-2040