Based on static pressurizing method,the leakage and degassing rate of a dewar of 210 L was measured.

• 运用静态升压法对国内某厂家生产的210L杜瓦的漏放气速率进行测量；绘制了夹层压力随时间的变化曲线；测得总漏放气速率为2.；0×10-8Pa