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5 A B C D E F G H I J K L M N O P Q R S T U V W Y Z
Ta Tb Tc Td Te Tg Th Ti Tl Tm Tn To Tp Tr Ts Tt Tu Tv Tw
Tia Tic Tie Tif Tig Tim Tip Tit

TIME LOCKING

by Metro Digital Resources Librarian • April 14, 2016

Interlocking protection which prevents the position of a switch, movable point frog or derail from being changed until a predetermined time has elapsed.

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