The groove (26) can be formed to better retain the ring (32) from damage from flowing fluids when the valve is open.
凹槽(26)可成形为更好地保持密封圈(32)在阀开启时不会受到流动流体的损害。
Artificial seismic production technique can efficiently improve flowing characteristics of formation fluids and then improve oil recovery factor.
人工地震采油技术可以有效地改善地层流体的流动特性，提高原油采收率。
Apparatus of the invention can mix fluids flowing serially, or two or more fluids entering the device from different feed channels.
发明的装置可以混合流体流动的连续，从不同的饲料渠道或两个或更多的液体进入设备。
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