This paper introduces the basic principle and the technical status quo of the current inversion arc welding machines, and points out several technical problems needed to be resolved.
本文介绍了目前逆变式弧焊机的基本原理和技术现状，并指出了有待进一步解决的几个技术问题。
The production process of tyre cord steel was presented, and the technical status quo of smelting, refining and continuous casting of tyre cord steel were analyzed by investigation technical data.
通过相关文献资料调研，介绍了帘线钢生产工艺流程及其冶炼、精炼和连铸技术现状，重点分析了帘线钢的质量控制。
Applications and status quo of modern ceramics (electronic ceramics, ceramets and superconducting ceramics etc. ) are generally introduced in respects of physical properties and technical principles.
从物理性能和技术原理方面概要介绍了现代陶瓷（ 电子陶瓷、 金属陶瓷及超导陶瓷等）的应用及现状；
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