The automatic forming device of the cladding layer of the solid rocket engine is a kind of equipment that can automatically complete the coating process of the
Polyvinylidene fluoride(PVDF)/polyurethane(PU)composite nanofiber membranes were prepared by mixing PVDF and PU at different mass ratios.The microstructure and
With the shortages of resources,environmental pollution,climate change,and other issues becoming more and more serious,it is extremely urgent to vigorously deve