“MACH: Sound Power Telephone;
MODEL: PHONTECH;
MAKER: ZHONGHANG SHIPBUILDING INDUSTRY CO.;
BOOK NO: TK40201-660-01;
DRAWING FOR INTERIOR COMM. SYSTEM” Wall type Sound Power Telephone, 12 LINES MODEL: BTS 4060 ZHONGHANG SHIPBUILDING.PHONTECH.99400-009-ML-01
“MACH: Sound Power Telephone;
MODEL: PHONTECH;
MAKER: ZHONGHANG SHIPBUILDING INDUSTRY CO.;
BOOK NO: TK40201-660-01;
DRAWING FOR INTERIOR COMM. SYSTEM” W/T CALL BOX, MODEL- 9016 ZHONGHANG SHIPBUILDING.PHONTECH.NA