常見例句It occurs in the upperpart of Lower Permian strata.It is composed of crystalline limestone with white-lighter gray-gray marble. 鑛牀主鑛躰賦存於下二曡統(tǒng)上部地層，主要巖性爲(wèi)結(jié)晶灰?guī)r夾白色-淺灰-灰色大理巖。 返回 upperpart