Making a comparison between bladder type accumulator and piston accumulator,the paper presents the characteristics of both devices,puts forward and recommends to “piston accumalator with gas bomb”circuit design solution for large oil compensating and pressure maintaining system and makes an exposition of the operating process and methods for pressurizing by air inflation with piston accumulator.

The method was presented that the composition of control system for iatrical intermittent pneumatic compression(IPC) apparatus and the design of its hardware and the software in detail,Basing on introducing the principle of iatrical intermittent pneumatic compression apparatus.