three ply

基本解釋

Three ply sandwiched base, heating evenly.
三層復(fù)合底，受熱均勻。
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The system adopts three-ply structure model, according the user colonies, it is divided into three sub-systems for students, teachers and system administrators.
本系統(tǒng)采用三層體系結(jié)構(gòu)，并按照用戶群體：學(xué)生、教師和系統(tǒng)管理員，將系統(tǒng)劃分成三個(gè)子系統(tǒng)。
In the design of Shaan Jing gas pipeline, in the light of the concrete condition and the overall technical and economic contrast, three ply PE external anti corrosion layer has been adopted.
陜京天然氣輸氣管線設(shè)計(jì)中，結(jié)合管線的具體情況和所進(jìn)行的全面技術(shù)、經(jīng)濟(jì)對(duì)比，選用了三層PE外防腐層。