Seal the blind plate and check carefully whether the pipeline is correctly connected and block phenomenon in the pipe before pressure test.
试压前要先封好盲板，认真检查管路是否连接正确，有无管内堵死现象。
The wave force on the steel-pipe pile which was connected and unconnected to the test platform was tested; and the acceleration versus time data and natural vibration frequency were obtained.
对波流力作用下连接及未连接平台的钢管桩进行了测试，获得了加速度时程曲线以及钢管桩固有频率。
The wave force on the steel-pipe pile which was connected and unconnected to the test platform was tested; and the acceleration versus time data and natural vibration frequency were obtained.
对波流力作用下连接及未连接平台的钢管桩进行了测试，获得了加速度时程曲线以及钢管桩固有频率。
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