| 释义 |
placer deposit短语¹⁴⁴⁹⁷²⁺²
基本例句
砂矿床,砂积矿床
Up till now several grains of diamond have been found in the Sinian, Triassic and Cretaceous clastic rocks, but in the lower reach the river there existed Quaternary industrial diamond placer deposit.
在震旦系、三叠系和白垩系碎屑岩中均找到共约数颗微粒金刚石，而在沅水下游则富集有第四纪工业砂矿床。 cnki
Liaoning Xiuyan Nephrite Placer DepositXNPD is a secondary deposit of primary nephrite ore.
辽宁岫岩软玉砂矿又称河磨玉矿是原生软玉矿的次生砂矿床。 dictall |