air bladder
6.It summarized the selection of urethral catheter, cannula methods, the depth of cannula insertion, the content and quantity of injecting into the air sac, the right time of both bladder washout and urethral catheter withdraw and their nursing care, to provide some references for most nursing workers when they were performed the same item of manipulation.
8.Abstract: 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.

