BACK ANALYSIS OF THE LONG- TERM TENSILE STRENGTH OF A ROCK PILLAR IN NIUCHANG ANCIENT UNDERGROUND CAVERNS IN LONGYOU COUNTY是什么意思_BACK ANALYSIS OF THE LONG- TERM TENSILE STRENGTH OF A ROCK PILLAR IN NIUCHANG ANCIENT UNDERGROUND CAVERNS IN LONGYOU COUNTY在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句