Im learning about Turing machines and have seen examples like this:

For example if we stand in state "A" and read "0" we replace it with "P" and move right.
However I came across this in old exams:

How am I to read this TM? for example in the middle we have $\#R_\#L$.
I am asked to describe the language over the alphabet $\{a,b\}$ that the TM represents. But I am unaware on how to read the machine at all.
Thanks.