Crystal has designed and developed various prototype machineries used  in different
fields   for   Indian Navy,   Chief  Quality    Assurance   Establishment   through  
Larsen   & Toubro Ltd.,    Ship  Building  Centre,  Vishakhapatnam etc.

Crystal has designed & executed a vast number of jobs  related  to  classified  fields 
for Defence Research  &  Development   Lab   through   Larsen  &   Toubro   Ltd.,
Chief  Quality  Assurance  Establishment & Ship Building Centre, Vishakhapatnam.