BS 4794-2 Sections 2.5 and 2.6:1978
Заменен
Specification for control switches (switching devices, including contactor relays, for control and auxiliary circuits, for voltages up to and including 1000 V a.c. and 1200 V d.c.), Indicator lights. Standardization of fixing hole of single hole mounted push-buttons and indicator lights
— 12 стр.
