1271. 修辞讲座 Lectures on Rhetorics
1272. 学科专研究 Subject Research
1273. 循环分析 Analysis of Cycling
1274. 循环力学 Cycling Mechanics
1275. 训估学 Phonology
1276. 压力焊 Pressure Welding
1277. 压缩机测试技术 Compression Test Technique
1278. 压缩机汽阀 Steam Valve of Compressor
1279. 压缩机制冷技术 Technology of Compressor Refrigeration
1280. 压缩机制冷原理 Principle of Compressor Refrigeration
