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The thin layers of vacuum concentration -- due to a kind of control of the thickness of the usage frequency variation of vibrating quartz crystal of matl depositions
The thin layers of vacuum concentration -- due to a kind of control of the thickness of the usage frequency variation of vibrating quartz crystal of matl depositions
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机译:真空浓缩的薄层-由于一种对沉积层振动石英晶体使用频率变化的厚度的控制
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摘要
A tube bundle, suitable for the transportation of gas from a subsea wellhead, comprises (a) an insulated external casing, (b) an internal production line for gas, moisture and possibly oil or condensate and (c) an internal tube for carrying a heating medium through the bundle to its wellhead end. The heating tube has a tapered or stepped layer of insulating material with the insulation increasing in thickness in the direction away from the wellhead. The combination of heating and carefully designed insulation is particularly effective in preventing hydrate formation in the gas line.
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