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2019-06-22It is well known that the flow rate and velocity of the valve mainly depends on the size of the valve, but also with the valve structure type of the resistance to the medium... -
2019-06-15With the rapid development of offshore oil and gas industry technology and people's demand for energy, the development of deepwater oil and gas fields will become the future offshore oil industryThe focus of industry development...... -
【Technical knowledge】 Air clear distance test of 800 kv high pressure valve hall in high altitude and dry nvironment2019-05-11Song Lin, a staff member of the power science research institute of the state grid corporation of qinghai province, adjusts equipment in the high-voltage experimental hall on May 9. -
This is a small void formed by the gas which can not escape during the solidification of metal. Its inner wall is smooth and contains gas. It has a high reflectivity to the ultrasonic wave...
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