而在许多矿井的生产实践中，掘进工作面瓦斯涌出量却显示出与直接源涌出量不一致的特性，常常出现瓦斯涌出异常现象。
However in the productive practice of mining, the gas gush quantity in dig working face is different with the gas fountain, it often shows abnormity.
为了消除精轧工作辊磨损和热膨胀对设定精度的影响，开发出了轧辊磨损及热膨胀数学模型，在生产实践中收到了良好的效果。
In order to eliminate the effect, mathematical models for wear and thermal expanding of work rolls were developed, and good effect has been produced since they were used in production.
文中作者根据多年开发、研制热熔胶涂布机的具体生产实践和经验，介绍了有关热熔胶涂布特点和热熔胶涂布机的工作原理及主要技术。
Here, the author will introduce it's traits and working principle and some important techniques about the coating machine of heating melt glue on his own specific practice and experience.
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