Turing machine notation, need translation

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Im learning about Turing machines and have seen examples like this: Example 1

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: Example 2

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.