- height clearance
- 剩余: surplus; remainder; residue
- 高度: altitude; height; elevation
- 净空高度: head room
- 净空高度: clearance height; free height; head room; head-room (overhead) clearance; headroom; headway; height of clearance; overhead clearance
- 通行高度；净空；净空高度: headroom
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