using hydraulic or pneumatic means (B23P19/033 takes precedence)

Full Title

Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation ; Tools or devices therefor so far as not provided for in other classes (hand tools in general B25) > for connecting objects by press fit or for detaching same (B23P19/10 takes precedence) > using hydraulic or pneumatic means (B23P19/033 takes precedence)