gravel layer
短语词组
- gravel sand layer 砂卵石层
- sandy gravel overburden layer 砂卵石覆盖层
- sandy gravel replacement layer 沙砾石置换层
- gravel filled layer 填砾层
- gravel pervious layer 砂砾石透水层
- grit and gravel overburden layer 沙砾石覆盖层
- sand gravel layer 砂卵石地层
- thick gravel layer 巨厚卵石层
- bottom gravel layer 底砾层 返回 gravel layer