查询词典 welted seam

Coal seam methane well ; drilling technology ; non-linear contact analysis ; Downhole Hammer Drilling ; rotary drilling

吉林大学；张龙飞煤层气井；钻井工艺；非线性接触分析；潜孔锤钻进；回转钻进

Clip sends roller roller to seam increase or decreasing is to pass installation to the hydraulic pressure crock of two side rises and drop in frame come pilot.

梗概： 夹送辊辊缝增加或减少是通过安装在框架两侧的液压缸上升和下降来控制的。

Drum sieve using imported technology to produce processing, according to uniform seam screen, opening a high rate, wear-resistant, long life cycle.

筛鼓采用进口技术加工制作，筛缝据均匀，开孔率高，耐磨，使用周期长。

Side airbags installed in the backrests of car seats demand a special seam construction on the backrest cover.

侧安全气囊安装在汽车座椅的靠背中，因而对加工汽车座椅靠背套要求一种特殊的缝纫线迹。

A seam of coal bassets.

桥缝焊接；桥线焊

A seam of coal bassets.

搭桥焊缝；桥接焊缝

To solve the tradition technique difficulties of water protection mining in the shallow coal seam with thin bedrocks, based on the analysis of the roof water inrush channel features, from the aspect of mining methods. A new set of roof water protection mining techniques were put forward.

在分析顶板导水通道特征基础上，针对薄基岩浅埋煤层采用传统技术实现保水开采的难点，从开采方法本身采取措施，提出了一套较为系统的薄基岩浅埋煤层保水开采新技术。

There is hidden safety problem of roof water inrush in the shallow coal seam with thin bedrocks during mining, because its roof bedrocks breaks and falls in a whole and affects ground surface directly.

薄基岩浅埋煤层开采过程中顶板基岩沿全厚切落，破断直接波及地表，存在顶板突水的安全隐患。

Thin bedrocks; shallow coal seam; water protection mining; rapid mining of coalface; supporter resistance; reduce mining height; filling

薄基岩；浅埋；保水开采；工作面快速推进；支护阻力；降低采高；充填

The defects, such as blowholes and incomplete penetration, occasionally appear in the welding process. These defects can affect the quality and the security of products. Therefore, defects detection in welding seam is extremely important.

在工业探伤领域，由于焊接过程出现的各种问题，会导致焊缝中含有气孔和未焊透等缺陷，影响产品的质量和安全，所以焊接图像中缺陷目标的检测十分重要。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。