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净空高度 jìngkōng gāodù
archit.	headway (由地板至顶棚或由地面至拱顶的垂直距离)
bridg.constr.	free height; headroom
chem.	head-room clearance
el.mach.	clear height
hydroel.st.	headway
manag.	height of clearance
met.	clearance height; head room
sport.	overhead clearance
车辆/ 桥下/隧道净空高度 jìngkōng gāodù
auto.	clear headroom; clear headway; clear height
桥梁/隧道净空高度 jìngkōng gāodù
auto.	clearance height; free height; vertical clearance
净空〔通航〕 高度
tech.	headway
净空开采高度
archit.	headroom

净空高度 : 17 phrases in 5 subjects

Architecture	2
Automobiles	2
Aviation	5
Bridge construction	2
Technology	6