管道投产前必须进行通球，以清除管内杂物。
There is necessary to carry out ball through pipeline before commissioning to cleaning remains in construction in pipeline.
对于小管径管道，其通球难度要大于大管径管道。
For small diameter pipeline it is more difficult than for large diameter pipeline.
介绍了小管径管道通球时卡球和解卡过程，还对水平管卡球原因进行了分析。
The paper made an introduction of ball through and process of bockage solution for small-diameter pipeline, and explanation of blockage in horizontal pipeline.
针对福州长乐机场航空煤油管道出现锈渣严重堵塞过滤器的现象，制定了具体的通球清管方案。
In pigging of jet fuel pipeline in Changle Airport of Fuzhou, the filter was blocked with rust.
报道上海城市燃气工程中，浦东新港首站至北蔡末站天然气供气管线的通球扫线、全线整体试压以及氮气置换的施工实例。
It reports a practical engineering of natural gas supply pipeline from Pudong New Port to Beicai Station in Shanghai metropolitan fuel gas project.
发球筒平衡接管的作用是在通球初始时，出球接口端的阀门未开启前使清管器在发球筒中处于前后压力平衡，不能撞向阀芯。
The balance extension tube functions to retain balanced pressure in front and at the back of the cleaner prior to the opening of the valve to prevent it from impacting the valve core.
目的：观察化瘀通脉注射液对大鼠主动脉球囊损伤后内膜增殖的影响。
Objective: to study the effect of Huayutongmai Injection on intimal proliferation of rat aorta after balloon injury.
手动要球的哀求：在跑到空挡时要球的技能已经是行患上通的，并且将会在所有游戏模式中都可运用，例如多人线上模式等等。
Manual Ball Request: The ability to demand the ball when running into space is now available to the player, and will be accessible in all game modes, such as multi-player, online, etc.
本发明公开了一种压差式自动关闭阀，该阀包括阀体、通端盖、阀芯球、弹簧座、弹簧、进口端、出口端；
The invention discloses a different-pressure automatic shuttle valve, comprising valve body, through end cover, valve core ball, spring seat, spring, inlet end, outlet port .
在此基础上，给出了环形非球谐振子径向矩阵元的通项公式和不同幂次径向矩阵元之间所满足的递推关系。
On the basis of previous works, in this paper, the general formulas and the recurrence formulas for radial matrix elements of the ring-shaped non-spherical oscillator are derived.
根据“球面上圆构造椭圆锥面”的原理，设计了球内接三通接头。
According to the principle of constructing elliptical conical surface by the circles on a sphere, a T-joint inscribed in a sphere is designed.
通孔每个屈曲通过了一个球。
该方法以球坐标系中三通道解耦自适应卡尔曼滤波为基础，结合最近邻（NN）方法或概率数据关联滤波（PDAF）方法实现杂波中的机动目标跟踪。
Based on adaptive Kalman filter in polar coordinates, the algorithm was implemented with NN method and PDAF to fuse sensors in clutter.
广州以通雕象牙球最为著名。
Guangzhou is well known for intricate hollowed-out ivory balls.
目的：观察化瘀通脉注射液对大鼠主动脉球囊损伤后内膜增殖的影响。
The rat model of intimal proliferation were copied by injuring aortic intima with self-made balloon.
阀门在全开时，通道平滑为直线，流阻系数极小，无压力损失，可通毛球清扫管线。
When fully opened, the valve's channel is smooth and linear, with an extremely small flow resisting coefficient and no pressure loss, and the pipeline can be cleaned with hair-ball through it.
密封面均喷焊硬质合金，具有防腐、耐磨、耐冲蚀等优点，使用寿命长、可通毛球清扫管线等特点；
Sealing surfaces are spray carbide, with corrosion, abrasion, erosion, etc. , long life, can pass the ball clean wool pipeline and other characteristics;
密封面均喷焊硬质合金，具有防腐、耐磨、耐冲蚀等优点，使用寿命长、可通毛球清扫管线等特点；
Sealing surfaces are spray carbide, with corrosion, abrasion, erosion, etc. , long life, can pass the ball clean wool pipeline and other characteristics;
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