oilfield pipe screw thread 石油管螺纹
Polyethylene Screw Thread Pipe 聚乙烯螺纹管
helix screw thread pipe 螺旋螺纹管
aspiratory screw thread pipe 吸排氧螺纹管
Lab experiments show that such tubing collar is feasible to some degree in preventing corrosion of the screw thread of water cycling pipe, thus extending the service life of water cycling pipe.
经实验室验证，复合接箍对回注水管柱螺纹防腐具有一定的可行性，可以延长回注水油管柱的整体使用寿命。
The heat transfer and flow pass condensation segment in the gravity heat pipe with inner screw thread were investigated.
分析了在重力热管内加内螺纹的方法，研究了重力热管的冷凝段的传热及流动状况。
The connecting pipe and the fixed sleeve pipe are fixedly connected mutually by a screw thread type or a clamping slot type.
接管和固定套管互以螺纹或卡槽式连接固定。
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