Warning: file_put_contents(/www/wwwroot/ppbbu/62383.com/cache/02c4b2833ec0f739a426d3cf03194dd8.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/62383.com/index.php on line 55 upperpart例句_upperpart英汉例句_upperpart双解例句_流逝汉英词典
It occurs in the upperpart of Lower Permian strata.It is composed of crystalline limestone with white-lighter gray-gray marble. 矿床主矿体赋存于下二叠统上部地层，主要岩性为结晶灰岩夹白色-浅灰-灰色大理岩。