To solve effectively the problem of sand removing in low-pressure absorption Wells, a drilling sand pump was developed.
为了有效解决低压漏失井的井下清砂问题,研究开发了一种具有钻进功能的捞砂泵。
In rare cases when bleeding occurs after removing the bandage, apply pressure to the site and raise your arm for 3-5 minutes.
在极少数情况下,拆下绷带时还有继续流血,按住伤口并抬起胳膊3 - 5分钟。
Experiment results indicate that the pressure is the most important parameter in rust-removing.
试验表明,压力是影响除锈效率最重要的参数。
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