What does HHMMSS stand for?

HHMMSS stands for "hour-hour / minute-minute / second-second"

How to abbreviate "hour-hour / minute-minute / second-second"?

"hour-hour / minute-minute / second-second" can be abbreviated as HHMMSS

What is the meaning of HHMMSS abbreviation?

The meaning of HHMMSS abbreviation is "hour-hour / minute-minute / second-second"

What does HHMMSS mean?

HHMMSS as abbreviation means "hour-hour / minute-minute / second-second"