於平面上挖出一凹槽所形成的平線腳。與「飾線（紋飾）」不同，後者為拋光飾線工具所製作出的鍍金或素面線條。

凹陷平線腳(P,,U,繁體中文-偏好,D,,)
凹線條(,U,繁體中文-非偏好,UF,U,U)
ao hsien p'ing hsien chiao(P,,U,韋氏拼音-偏好,UF,,)
āo xiàn píng xiàn jiǎo (P,,U,漢語拼音-偏好,UF,,)
ao xian ping xian jiao(P,,U,漢語拼音(無聲調)-偏好,UF,,)
sunk fillets(P,,U,英文-偏好,D,U,PN)
sunk fillet(,U,英文-非偏好,AD,U,SN)
fillets, sunk(,U,英文-非偏好,UF,U,N)
moldings, sunk(,U,英文-非偏好,UF,U,N)
mouldings, sunk(,U,英文-非偏好,UF,U,N)
sunk moldings(,U,英文-非偏好,UF,U,N)
sunk mouldings(,U,英文-非偏好,UF,U,N)
verholen riemen(P,,U,荷蘭語-偏好,D,U,U)
filetes rehundidos(P,,U,西班牙語-偏好,D,U,PN)
filete rehundido(,U,西班牙語-非偏好,AD,U,SN)

藝術與建築詞典根目錄
....物件層面
........組件 (層級名)
............成分
................<依特定背景區分之組件>
....................建築元素
........................<表面元素與表面元素構造>
............................<表面元素>
................................<線腳與線腳構造：建築>
....................................<線腳：建築>
........................................<依形式區分之建築線腳>
............................................<依形式區分之建築線腳：剖面>
................................................平線線腳 (線腳)
....................................................凹陷平線腳

distinguished from....

飾線(紋飾)

英文....	Fillet moldings that are produced by cutting a groove in a plane surface. Distinguished from "fillets (motifs)" which are an impressed line, either gilt or blind, created by the finishing tool, the fillet.
荷蘭語....	Geriemde lijstwerken die onstaan door het uitsnijden van een groef op een effen oppervlak. Te onderscheiden van 'riemen (motieven)', waarbij een vergulde of onzichtbare groef is ingedrukt met behulp van het benodigde gereedschap, de riem.

凹陷平線腳............	[AS-Academia Sinica]
.................	AAT-Taiwan 借詞編輯與使用原則 (2013)
sunk fillets............	[VP]
.................	Dictionary of Architecture and Construction (1975) illustration
.................	Smit, Means Illustrated Construction Dictionary (1985)
.................	Putnam and Carlson, Architectural and Building Trades Dictionary (1974)
sunk fillet............	[VP]
.................	Getty Vocabulary Program rules
fillets, sunk............	[VP]
.................	Getty Vocabulary Program rules
moldings, sunk............	[VP]
.................	Getty Vocabulary Program rules
mouldings, sunk............	[VP]
.................	Getty Vocabulary Program rules
sunk moldings............	[VP]
.................	Dictionary of Architecture and Construction (1975)
.................	Smit, Means Illustrated Construction Dictionary (1985)
.................	Putnam and Carlson, Architectural and Building Trades Dictionary (1974)
sunk mouldings............	[VP]
.................	Getty Vocabulary Program rules
verholen riemen............	[Bureau AAT]
.................	AAT-Ned (1994-)
filetes rehundidos............	[CDBP-DIBAM]
.................	Comité, Plural del término en singular
filete rehundido............	[CDBP-DIBAM]
.................	TAA database (2000-)
Subject:............	[Bureau AAT]
.................	Bureau AAT, RKD

Getty AAT: 300003532 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300003532
聯合目錄： 凹陷平線腳 、凹線條 、ao hsien p'ing hsien chiao 、āo xiàn píng xiàn jiǎo 、ao xian ping xian jiao 、sunk fillets 、sunk fillet 、fillets, sunk 、moldings, sunk 、mouldings, sunk 、sunk moldings 、sunk mouldings 、verholen riemen 、filetes rehundidos 、filete rehundido