平台貨車的底座中，有一部份低於底板，可容納垂直高度過大的特殊貨物; 自二十世紀早期開始使用。若指稱二十世紀中期開始使用、中央凹陷處更大，主要用來裝載聯運貨櫃的平板車，見“超低式大平板車”一詞。

凹底平板車(P,,U,繁體中文-偏好,D,U,U)
凹底平臺車(,U,繁體中文-非偏好,UF,,)
ao ti p'ing pan ch'e(P,,U,韋氏拼音-偏好,UF,U,U)
āo dǐ píng bǎn chē(P,,U,漢語拼音-偏好,UF,U,U)
ao di ping ban che(P,,U,漢語拼音(無聲調)-偏好,UF,U,U)
depressed center flatcars(P,,U,英文-偏好,D,U,PN)
depressed center flatcar(,U,英文-非偏好,AD,U,SN)
cars, depressed center(,U,英文-非偏好,UF,U,N)
cars, depressed center flat(,U,英文-非偏好,UF,U,N)
center cars, depressed(,U,英文-非偏好,UF,U,N)
center flat cars, depressed(,U,英文-非偏好,UF,U,N)
center flatcars, depressed(,U,英文-非偏好,UF,U,N)
depressed center cars(,U,英文-非偏好,UF,U,N)
depressed center flat cars(,U,英文-非偏好,UF,U,N)
flat cars, depressed center(,U,英文-非偏好,UF,U,N)
flatcars, depressed center(,U,英文-非偏好,UF,U,N)
vagones de centro rebajado(P,,U,西班牙語-偏好,D,U,PN)
vagón de centro rebajado(,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
........裝備與設備
............運輸工具 (層級名)
................<運輸工具>
....................交通工具 (運輸)
........................陸上交通工具
............................<依形式區分之陸上交通工具>
................................<導軌載具>
....................................<有軌道之導軌載具>
........................................鐵路車輛
............................................鐵路貨車
................................................<依形式區分之鐵路貨車>
....................................................平臺貨車
........................................................凹底平板車

distinguished from....

超低式大平板車

英文....	Flatcars having a portion of the floor set lower than the deck to accommodate special loads with oversized vertical dimensions; in use since the early 20th century. For flatcars in use since the mid-20th century with larger depressed central sections designed primarily to accommodate intermodal containers, use "well cars."

凹底平板車............	[AS-Academia Sinica]
.................	AAT-Taiwan 借詞編輯與使用原則 (2013)
depressed center flatcars............	[VP]
.................	Lewis et al., Railway Age's Railroad Dictionary (1984)
depressed center flatcar............	[VP]
.................	Getty Vocabulary Program rules
cars, depressed center............	[VP]
.................	Getty Vocabulary Program rules
cars, depressed center flat............	[VP]
.................	Getty Vocabulary Program rules
center cars, depressed............	[VP]
.................	Getty Vocabulary Program rules
center flat cars, depressed............	[VP]
.................	Getty Vocabulary Program rules
center flatcars, depressed............	[VP]
.................	Getty Vocabulary Program rules
depressed center cars............	[VP]
.................	Webster's Third New International Dictionary (1961)
depressed center flat cars............	[VP]
.................	Car and Locomotive Cyclopedia (1980) illustration, GLOS
flat cars, depressed center............	[VP]
.................	Getty Vocabulary Program rules
flatcars, depressed center............	[VP]
.................	Getty Vocabulary Program rules
vagones de centro rebajado............	[CDBP-DIBAM]
.................	Comité, Plural del término en singular
vagón de centro rebajado............	[CDBP-DIBAM]
.................	Diccionario de términos científicos y técnicos (1981) 5:2383

Getty AAT: 300233715 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300233715
聯合目錄： 凹底平板車 、凹底平臺車 、ao ti p'ing pan ch'e 、āo dǐ píng bǎn chē 、ao di ping ban che 、depressed center flatcars 、depressed center flatcar 、cars, depressed center 、cars, depressed center flat 、center cars, depressed 、center flat cars, depressed 、center flatcars, depressed 、depressed center cars 、depressed center flat cars 、flat cars, depressed center 、flatcars, depressed center 、vagones de centro rebajado 、vagón de centro rebajado