tongue-and-groove method闭口式孔型轧制法

tongue-and-groove rolling闭口孔型轧制

tongue-and-groove floor企口地板

tongue-and-groove labyrinth复式企口

tongue-and-groove coupling舌槽榫合联轴器

tongue-and-groove flooring企口地板

gular tongue-and-groove joint三角榫接

tongue-and-groove protective strip企口防护条

tongue-and-groove connection企口接合

tongue-and-groove sheet pile企口板舂;企口板桩