两阶段位移测试装置。1:阀门;2:气瓶;3:恒定磁泵;4:真空泵;5:天然气储罐;6:压力表;7:温度控制器;8:液压油泵;9:吸附罐; 10: hydraulic water pump; 11: water bath tub; 12: gas-liquid separation bottle; 13: gas collection cylinder; 14: pressure control valve; 15: one-way valve.