(A) both arms are horizontal
(B) semaphore arm lowered but warner arm horizontal
(C) both semaphore and warner arms lowered
(D) none of the above
(A) both arms are horizontal
(B) semaphore arm lowered but warner arm horizontal
(C) both semaphore and warner arms lowered
(D) none of the above
| Share this... |
Facebook
|
Twitter
|
Linkedin
|
Whatsapp
|
Your email address will not be published. Required fields are marked *