...例如：医师的正确诊断 及空中旅游的安全，似乎较会产生负失验（negative disconfirmation），然而效用提升（utility-enhancing） 属性，例如：医师的幽默及在飞机上的娱乐活动， 似乎较会产生正失验（positive disconfirmation）， 因此「车内空间是一个效用.
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The utility model relates to an electric heating device for an oil well which is constituted on an oil tube in the oil well and used for enhancing oilfield recovery efficiency.
一种在油井里油管上构成用以提高油田采收率的采油井电加热装置。
The utility model has the characteristic of safe use of sandwich glass, and also has the effect of enhancing bright colors.
本实用新型既具夹层玻璃使用安全的特性，又具增强色彩鲜艳的效果。
The utility model has the advantages of increasing the thickness of the heat welding parts, enhancing the tensile strength of the heat welding parts and reducing the welding skill requirements.
本实用新型 的优点是：增加熔接部位的厚度，增强熔接部位的抗拉强度且降低对焊接技能的 要求。
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