用來畫平行直線的製圖工具，沿著製圖板移動，通常為無刻度的木條、金屬條或塑膠條，利用金屬線或細線穿過兩把尺的兩端以保持尺的平行，有時下方裝有轉輪。另外由轉軸連結，通常於航海時用來進行平行線轉換的工具，則稱「平行規」。

平行尺(P,,U,繁體中文-偏好,D,U,U)
p'ing hsing ch'ih(P,,U,韋氏拼音-偏好,UF,U,U)
píng xíng chǐ(P,,U,漢語拼音-偏好,UF,U,U)
ping xing chi(P,,U,漢語拼音(無聲調)-偏好,UF,U,U)
parallel rules(drafting tools)　(P,,U,英文-偏好,D,U,PN)
parallel rule(drafting tool)　(,U,英文-非偏好,AD,U,SN)
parallel rulers(drafting tools)　(,U,英文-非偏好,UF,U,N)
rule, parallel(drafting tool)　(,U,英文-非偏好,UF,U,N)
rulers, parallel(drafting tools)　(,U,英文-非偏好,UF,U,N)
rules, parallel(drafting tool)　(,U,英文-非偏好,UF,U,N)
reglas planas graduadas(P,,U,西班牙語-偏好,D,U,PN)
regla plana graduada(,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
............測量儀器 (層級名)
................測量裝置 (器械)
....................<程度範圍之測量儀器>
........................<距離測量儀器>
............................<直線距離測量儀器>
................................尺 (測量儀器)
....................................平行尺

藝術與建築詞典根目錄
....物件層面
........裝備與設備
............工具與設備 (層級名)
................設備
....................<依程序區分之設備>
........................<圖像製作設備>
............................<起草、繪圖、書寫設備>
................................<依一般種類區分之起草、繪圖、書寫設備>
....................................起草設備
........................................平行尺

distinguished from....

平行規(航海工具)

英文....	Drafting tools for drawing straight parallel lines, generally consisting of ungraduated strips of wood, metal, or plastic guided along drafting boards and held parallel by wires or strings passing through the ends of the rules; may or may not slide on rollers. For a set of two attached and pivoting rulers used often as navigational aids to transfer parallel lines, prefer "parallel rulers."

平行尺............	[AS-Academia Sinica]
.................	藝術名詞與技法辭典 p. 326
p'ing hsing ch'ih............	[AS-Academia Sinica]
.................	TELDAP database (2009-)
píng xíng chǐ............	[AS-Academia Sinica]
.................	TELDAP database (2009-)
ping xing chi............	[AS-Academia Sinica]
.................	TELDAP database (2009-)
parallel rules(drafting tools)............	[VP]
.................	1987 Charaette Catalog illustration, 110
.................	Mayer, Dictionary of Art Terms and Techniques (1969)
.................	Webster's Third New International Dictionary (1961)
.................	Winterthur Museum, Object name list, unpub. (1987)
parallel rule(drafting tool)............	[VP]
.................	Getty Vocabulary Program rules
parallel rulers(drafting tools)............	[VP]
.................	Breed and Hosmer, Principles and Practice of Surveying. Vol 1 (1970) 546; parallel rulers
.................	Webster's Third New International Dictionary (1961) parallel rulers
.................	Getty Vocabulary Program rules
rule, parallel(drafting tool)............	[VP]
.................	Chenhall, Revised Nomenclature (1988)
rulers, parallel(drafting tools)............	[VP]
.................	Getty Vocabulary Program rules
rules, parallel(drafting tool)............	[VP]
.................	Getty Vocabulary Program rules
reglas planas graduadas............	[VP]
.................	Getty Vocabulary Program rules
regla plana graduada............	[VP]
.................	The Oxford- Duden Pictorial Spanish and English Dictionary (1995)

Getty AAT: 300022530 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300022530
聯合目錄： 平行尺 、p'ing hsing ch'ih 、píng xíng chǐ 、ping xing chi 、parallel rules 、parallel rule 、parallel rulers 、rule, parallel 、rulers, parallel 、rules, parallel 、reglas planas graduadas 、regla plana graduada