to (AGAINST), telegraphic code

JUSE is the telegraphic code for the Union of Japanese Science and Engineering, Tokyo.

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Lot-to-lot variation from any one supplier is usually enough to give fits to manufacturing. It is reasonable to expect that variation between lots from two ...

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to (AGAINST)
preposition
against or very near:
Stand back to back.
They were dancing cheek to cheek.

A telegraph code is a character encoding used to transmit information through telegraphy machines. The most famous such code is Morse code.