133 Middle Road, Level 4 - Back Office


To access our back office at Bank of China (Level 4) @ 133 Middle Road.
Go in the side stair and tell the security guard you want to go to Informatics.
When you reach the level 4, call me and I'll come out to open to door for you to enter.


Amplitude and Frequency


Amplitude uses the height of the wave for encode the signal.
Frequency uses the number of cycle of wave to encode the signal.


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