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保持始终打开
Keep it always open
以上为机器翻译结果，长、整句建议使用 人工翻译 。
我始终保持两张照片打开。
I always kept two photos opened.
youdao
许多种压控测试阀均是通过环空加泵压打开，泄掉泵压关闭，开井过程中环空始终保持一定的开启压力。
Many pressure dominated testing valve is through pumping of relieving annulus pressure to realize open or shut down hole test valve and keep annulus pressure for certain all the time.
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