短語詞組短語chert clause [經(jīng)]燧石條款diatomaceous chert 矽藻燧石oolicastic chert 空鮞狀燧石bone chert [巖]骨狀燧石;骨燧石chert bit 鑽矽質(zhì)石灰?guī)r用的鑽頭nodular chert 瘤狀燧石;燧石結(jié)核Structure Chert 結(jié)搆圖ocastic chert 鮞狀燧石 返回 chert