Two commonly used methods of pressurization test of pipelines with free-surface in best common are close water test and close gas test.
闭水试验和闭气试验是无压管道进行严密性试验最常采用的两种试验方法。
The test results showed that using medium weight shock test machine to simulate under water not-touch close quarters blast environment to test equipment is a feasible technical measure.
试验结果表明，用中量级冲击机来模拟水下近距离非接触爆炸性环境并对装备进行考核是当前可行的一种技术手段。
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