Compared with the common seam track system, this article introduces the working principle of optical sensor with structured light.
对几种常见的焊缝跟踪系统进行比较，着重介绍了结构光式视觉传感器的工作原理。
The ultrasonic sensor and the working principle in the seam tracking are explained.
介绍了超声波传感器及其焊缝跟踪工作原理。
Based on the analysis of gas source at the working face with "three-soft" unsteady coal seam, the authors introduce the principle and method of gas suction by roof-rock drilling.
前言：通过对“三软”不稳定煤层采煤工作面瓦斯来源的分析，介绍了采用顶板岩石钻孔抽放解决瓦斯问题的原理和方法。
Accordingly, the distribution of abutment pressure on the block coal pillar is measured at working face with a steeply inclined seam of the12010 face, NO.
据此原理，实测得到了平煤集团十三矿12010大倾角综放开采工作面走向支承压力和区段煤柱侧向支承压力分布。
The working principle of the rotating arc sensor used in seam tracking is introduced.
介绍了旋转电弧传感器用于焊缝跟踪的工作原理。
Based on laboratory experiments and in-situ observations, it has been proved that outburst of coal and gas in in-seam drivage is a chain reaction process of disc tensile fracture in a working face.
本文通过基础试验和现场观测，证明了煤巷掘进工作面煤与瓦斯突出是工作面煤壁盘形拉伸破坏的连锁反应过程。
The pulse laser cutting is a new working process, which can make the seam to contact better with the body of knife, so the strength, life and rigidity of the die board have risen.
用脉冲激光切割模切板使切缝和刀体保持良好的接触，提高了模切板的刚度、强度及使用寿命。
The testing results of working face coal samples and roof impact tendency indicated that the coal seam belongs to high impact tendency and has pressure bumping possibility.
工作面煤样和顶板冲击倾向性测试结果表明，该煤层属于高冲击倾向性煤层，具有发生冲击矿压的能力。
Adopt double pre-scoring when working, then do final scoring, reduce scoring Seam broken, suit for poor quality carton sheet manufacture.
分切前后采用两次预压送纸，最后压线成型降低纸板的爆线率，适用于劣质纸的加重箱板的成型。
Adopt double pre-scoring when working, then do final scoring, reduce scoring Seam broken, suit for poor quality carton sheet manufacture.
分切前后采用两次预压送纸，最后压线成型降低纸板的爆线率，适用于劣质纸的加重箱板的成型。
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