Hydraulics have been around for a very long time... certainly since the third century BC, and if your definition is broad enough even before that.
how long has deforestation been around
As long as guns have been around.
To move up and down, to move around efficiently.
how long has the london eye been around for
As long as So Random has been around.
Liquid is needed to use hydraulics. It's what makes hydraulics work.
it runs with hydraulics .the hydraulics contains some oil immersion , fluids.
They have always been around
234 years fool
how long have boxing been around?
boner
Depends how good are the hydraulics.