three ply

基本解释

Three ply sandwiched base, heating evenly.
三层复合底，受热均匀。
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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.
本系统采用三层体系结构，并按照用户群体：学生、教师和系统管理员，将系统划分成三个子系统。
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.
陕京天然气输气管线设计中，结合管线的具体情况和所进行的全面技术、经济对比，选用了三层PE外防腐层。