Can someone point out and explain what each parts of these electrical components are?

There are about six stations here. What do each do, and what are they called?

I think these hold oil right? What is this called?

I believe this is a mid-span bridle. What is this used for?

What are the components above the low voltage power lines and what do they do? And are those porcelain resistors that the high voltage power lines are passing through?