为提高现有双级注水泥器打开和关闭的成功率，研制了DSG—A型系列双级注水泥器。
To raise the success rate of opening and closing the two-stage cementing tool, Model dsg-a cementing tool is developed.
介绍了SJG-A型双级注水泥器的结构特点、使用要求及现场应用情况。
The paper gives an introduction to the structure , operating requirements and applications in olifields of Type SJG A double stage cementing implement.
型滚筒熨平机为双级熨压．其压力可由的液压系统控制，可实现连续调整。
Two pressure rollers are adopted and the ironing pressure which is controlled by hydraulic system can be adjusted freely.
本机为L型、两列、两级、双作用、水冷、有十字头的固定式往复活塞空气压缩机。
This machine is of LV model, double-row, double-step, double function, water-cooling, and intercrossing, fixed, no basic reciprocating piston type air compressor.
本公司中心型蝶阀、双偏心蝶阀获得国家高新技术产品和国家级星火项目。
Among our products, the central type butterfly valve and double eccentric butterfly valve are both awarded with National Hi and New Technological products, and National Level Spark Project.
某热电厂CC12-4.90/0.98/0.294型双抽冷凝式汽轮机在运行中出现了振动过大现象，停机揭缸后发现次末级有两片叶片从叶片约三分之一处断掉。
HuangGu Thermal Power Plant CC12-4.90/0.98/0.294 condensing turbine with two intermediate stage extractions appears excessive vibration in the operation.
上海欧雅斯电气有限公司推出的一种双投型CB级一体式自动转换开关电器（ATSE），省略了CB级ATSE常有的机械联锁装置，转换动作速度大大提高。
An integrated dual-switching CB level automatic transfer switch equipment(ATSE), which is produced by Shanghai OYAS Electrics Co.
顶替型打开塞用于连续式双级注水泥作业，也适用与在斜井中使用。
The pump-down opening plug is used for continuous cementing operation and in deviated Wells.
液压开门器与BS63-B型双级、双流量、单输出专用液压手动泵配合使用。
Hydraulic Door Openeris designed to work together with BS63-B double-stage double-flow single-output hydraulic manual pump.
液压开门器与BS63-B型双级、双流量、单输出专用液压手动泵配合使用。
Hydraulic Door Openeris designed to work together with BS63-B double-stage double-flow single-output hydraulic manual pump.
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