... River-bed evolution in the b… 长江口深水航道治理工程实施后南北槽分汊段河床演变 river bed placer 河床砂矿 river bed conservation 河床保护 ...
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river-bed placer 河床砂矿
river r bed placer 河床砂矿
·2,447,543篇论文数据，部分数据来源于NoteExpress
Then, dispersal gold placer within the intermediate store body was enriched in gravel bed of detention in river bed after many times intermittent elevation, and the gold placer deposit was formed.
当地壳多次间歇性上升后，使砂金中间储存体中分散的砂金集中富集在河床滞留砾石层中，从而形成砂金矿床。
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