00311nam a2200133Ia 4500 230312s9999||||xx |||||||||||||| ||und|| 621.38152 SEM Semiconductors for wired telecom system Philips 1997 897 Eng. Engineering BK 1644 1644 0 0 ddc 0 0 SIRC SIRC 2023-03-13 0 621.38152 SEM 1654 2023-03-13 2023-03-13 BK