BS 1745:1951

Отменен

Specification for alternating-current relays for railway signalling: track relays (double-element, 2-position), line relays (single-element, 2-position) — 12 стр.

Описание Изменения Ссылки Версии

ICS

29.120.70 Relays / Реле

45.040 Materials and components for railway engineering / Материалы и компоненты для железнодорожной техники