Non-Capturing Group(?:\d{1,2}\/){2} {2}repeats the group contents below exactly 2 times:
\d{1,2}a digit, repeated between 1 and 2 times
\/the literal / (4710 / 578 / 2F16)
\d{4}a digit, repeated exactly 4 times
\s+any whitespace character, repeated at least once
Non-Capturing Group(?:\d{1,2}:){2} {2}repeats the group contents below exactly 2 times:
\d{1,2}a digit, repeated between 1 and 2 times
:the literal : (5810 / 728 / 3A16)
\d{1,2}a digit, repeated between 1 and 2 times