- channel order
- 河道: river course; streamway; cov ...
- 级: level; rank; grade
- 河道: river course; streamway; covalency; runway; cut; river channel◇河道变迁 channel change; migration of channel; 河道沉积 within-channel deposit; 河道冲刷 river channel erosion; 河道改直 rectification of river; 河道汇流 concentration of channel; 河道疏浚 training of channel; 河道网 river net; 河道污染 pollution of river; 河道淤积 river channel sedimentation; 河道整治 channel improvement
- 渠道级数: channel lever
- 隧道级别: tunnel class
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