end upsetting
... end-up竖着、直立着、结束 end upsetting管端加厚 endurance crack疲劳裂纹 ...
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管端加厚
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管端加厚机 tube-end upsetting machine
管子未加厚端部 plain end
油井管端部加厚设备 oil well butt thicken equipment
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介绍了非开挖钻杆管端加厚生产线自动控制系统的设计。
The design of non-dig drill pipe end-upsetting product line autocontrol system were introduced in this paper.
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