管外保护层;
Numerical simulation analysis of pipe in earth covering to large cross-section flat-top burial tunnel
平顶暗挖隧道覆土层内管线数值模拟分析
The article deals with the computer software system for the plug pipe mill, covering such aspects as functions, structure and configuration of hardware and software.
介绍了自动轧管机组计算机软件系统的功能与结构、硬件与软件的配置。
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