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拱顶石
bridg.constr.	arch key stone; capstone of arch; crown stone of arch; arch key; keystone at crown
eng.geol.	clavel; clavis
exhib.	capstone
hydroel.st.	key block; keystone; crown block; arch keystone
met.	choke stone; key stone
mount.	cannon stone
tech.	apex piece; apex stone; choke aggregate; crown stone; filler stone; lech; soffit cusp; top block; vault key (block); key-stone; key
连拱顶石
archit.	arcade key
拱压顶石
archit.	capstone
拱顶〔冠〕石
construct.	arch key (stone)
拱〔压〕顶石
gen.	capstone
拱顶冠石
archit.	arch key (stone)
拱顶心石
archit.	key stone
拱顶砖石
tech.	apex block

拱顶石: 42 phrases in 4 subjects

Architecture	3
General	3
Plastic surgery	1
Technology	35