SW ▁tools ▁and ▁correct ▁parameter ▁setting ▁a ▁sound ▁and ▁defect - free ▁w eld ▁can ▁be ▁produce ▁in ▁order ▁to ▁joint ▁the ▁metal ▁ 3 D ▁printing ▁materials . ▁ ▁Environment al ▁use ▁ ▁In ▁Bah rain , ▁large - scale ▁ 3 D ▁printing ▁using ▁a ▁sand stone - like ▁material ▁has ▁been ▁used ▁to ▁create ▁unique ▁cor al - sh aped ▁structures , ▁which ▁encou rage ▁cor al ▁poly ps ▁to ▁colon ize ▁and ▁reg ener ate ▁dam aged ▁re ef s . ▁These ▁structures ▁have ▁a ▁much ▁more ▁natural ▁shape ▁than ▁other ▁structures ▁used ▁to ▁create ▁artificial ▁re ef s , ▁and , ▁unlike ▁concrete , ▁are ▁neither ▁acid ▁nor ▁al kal ine ▁with ▁neutral ▁p H . ▁ ▁Cultural ▁her itage ▁▁ ▁In ▁the ▁last ▁several ▁years ▁ 3 D ▁printing ▁has ▁been ▁intens ively ▁used ▁by ▁in ▁the ▁cultural ▁her itage ▁field ▁for ▁pres ervation , ▁rest oration ▁and ▁dis sem ination ▁purposes . ▁Many ▁Europe ans ▁and ▁North ▁American ▁Museum s ▁have ▁purchased ▁ 3 D ▁printer s ▁and ▁act ively ▁re create ▁missing ▁pieces ▁of ▁their ▁re lic s . ▁ ▁Sc an ▁the ▁World ▁is ▁the ▁largest ▁archive ▁of ▁ 3 D ▁print able ▁objects ▁of ▁cultural ▁significance ▁from ▁across ▁the ▁glo be . ▁Each ▁object , ▁origin ating ▁from ▁ 3 D ▁scan ▁data ▁provided ▁by ▁their ▁community , ▁is ▁optim ised ▁for ▁ 3 D ▁printing ▁and ▁free ▁to ▁download ▁on ▁My M ini Factory . ▁Through ▁working ▁alongside ▁museum s , ▁such