These negative qualities hinders its use because it results in high transport costs, difficulty in handling and storage, as well as low energy density.
这些负面性质阻碍其使用，导致高运输成本，处理和储存困难以及低能量密度。
Moreover imports the fitting also to have the price to be high, questions and so on service difficulty as well as claim difficulty.
而且进口配件还存在价格高、维修困难以及索赔困难等问题。
Traditional MES software causes great development difficulty, long developing period, high cost, low reliability as well as bad re-structuring and integration ability.
传统的MES软件开发难度大，周期长，成本高，软件的可靠性差，系统的可重构性和可集成性差。
In the light of the difficulty in artificial lifting of waxy oil well, high pour-point oil well and viscous oil well, a new tubing heating system is developed.
针对含蜡油井、高凝油井、稠油油井生产过程中的举升难题，研制了一种新型油管加热采油装置。
While under the condition of high temperature and high pressure, the safe drilling in thin safe density window is the technical difficulty that can not be solved well around the world.
随着深部油气藏的勘探和开发，深井及超深井的数量大幅度增加，而深井超深井在高温高压条件下，窄安全密度窗口内的安全钻井是当前国内外都未能很好地解决的重大技术难题。
Single operation in horizontal well has only difficulty and low risk, but it takes long time and high cost.
水平井单项作业难度较小，风险也较小，但施工周期长，费用大。
Single operation in horizontal well has only difficulty and low risk, but it takes long time and high cost.
水平井单项作业难度较小，风险也较小，但施工周期长，费用大。
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