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Example of various powder-based 3D-printed mechanical and aerospace application devices (a) MJF 3D-printed functional part, feature size 2 mm. Reproduced with permission from [109]; (b) SLM 3D-printed ion optics grids. Reproduced with permission from [226]; (c) repair of compressor blade by PDMD 3D-prining process, minimum feature size 0.6409 mm to 1.2218 mm. Reproduced with permission from [222].
