TREA

by electro-acoustic means

Follow

Industry

  • CPC
  • G04C21/12
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

GPHYSICS G04Horology G04CELECTROMECHANICAL CLOCKS OR WATCHES G04C21/00Producing acoustic time signals by electrical means

Current Industry

G04C21/12by electro-acoustic means
Industries