The basic idea of the quantum theory of field and gauge theory is introduced and it's importance in particle physics is explained.
介绍量子场论与相互作用的规范理论的基本思想及其在粒子物理中的核心地位。
The simplest and most basic application is as a Gauge Hanger where no sealing mechanism is required;
最简单最基础的应用就是在无需密封的时候，作为悬挂器使用；
The character, basic structure, work principle, and basic operation of SDC-12 handy multifunction tubing length measurement gauge are described in this text.
文章介绍了SDC - 12型手提式多功能油管测长仪的特点、基本结构、工作原理、基本操作。
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