- 大: big; large
- 砾石: gravel; grail; dirt
- 大砾石层: large gravel bed
- 天然大砾石: native boulders
- 砾石: gravel; grail; dirt◇砾石层 gravel layer; 砾石堆 ruckle; 砾石堆积 xalsonte; 砾石混凝土 gritcrete; 砾石筛分机 gravel sorter; 砾石崖 gravel bank; 砾石岩层 gravel
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