Application of the technology of prestressed anchor by secondary high-pressure grouting in the reinforcement of main ore-pass No. 2 at Chengchao Iron Mine是什麼意思_Application of the technology of prestressed anchor by secondary high-pressure grouting in the reinforcement of main ore-pass No. 2 at Chengchao Iron Mine在線翻譯_英語_讀音_用法_例句