DDD-C-641B, FEDERAL SPECIFICATION: CURTAIN, AIRPORT; CURTAIN, DOORWAY; AND CURTAIN FIXTURES (30-JUN-1964)

DDD-C-641B, FEDERAL SPECIFICATION: CURTAIN, AIRPORT; CURTAIN, DOORWAY; AND CURTAIN FIXTURES (30-JUN-1964)., This specification covers curtains and curtain fixtures primarily intended for airports (portholes) and doorways.