What the above mechanical and electrical products' concept is in the supervisory work forms gradually is precisely is established by usage the concept.
上述机电产品的概念是管理工作中逐渐形成的且是约定俗成的概念。
A social intercourse is a big branch of speech action study of appellation or addressing and it is a conveying and succeeding symbolic system established by usage.
社交称谓是称谓或称呼言语行为研究中一个大的分支，是一种约定速成的传承性符号系统。
The parties are bound by any usage to which they have agreed and by any practice they have established between themselves.
当事人受它们同意的惯例以及它们之间确立的习惯做法的拘束。
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