English ⇄ Arabic Chinese Danish Dutch Finnish French German Greek Italian Japanese Lithuanian Polish Portuguese Russian Spanish Swedish Ukrainian +

blocking signal
telecom.	閉塞信号
block signal ['blɔk'sɪgn(ə)l]
railw., sec.sys.	閉そく信号機
tech.	閉塞信号機 (へいそくしんごうき)
telegr.	ブロック信号

blocking signal : 3 phrases in 1 subject

Telegraphy

3