三元化合物结构 ternary compound structure
三层PE复合结构 composite structure with 3 coats of PE
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宅院格局均为三合院、四合院式和一字屋，外观立面和梁架结构等都基本保存原有的传统风貌。
The house is courtyard courtyard pattern, and a house, and all the exterior facades beam structure basically preserved the original traditional style.
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