There are different types of piston pumps, depending on the type of piston. For a more liquid type of piston pump, there are also different types of piston pumps, depending on the type of piston. For a single-stage piston pump, one is piston pump and another is the multi-piston pump.
Hydraulic piston pumps are divided into three types: one is piston pumps, another are the hydraulic piston pumps. One are piston pumps, another are the hydraulic piston pumps. They are secondarily hydraulic piston pumps, which are a type of piston pump.