481. 焊接检验 Welding Testing
482. 焊接结构 Welding Structure
483. 焊接金相 Welding Fractography
484. 焊接金相分析 Welding Fractography Analysis
485. 焊接冶金 Welding Metallurgy
486. 焊接原理 Fundamentals of Welding
487. 焊接原理及工艺 Fundamentals of Welding & Technology
488. 焊接自动化 Automation of Welding
489. 汉语 Chinese
490. 汉语与写作 Chinese & Composition
