菱镁复合宝丽板的研制
Development of magnesite compound " Baoli " board
模板采用宝丽板贴面明显提高了混凝土表面的光洁度，显著降低了流道糙率；
The purpose of Bao-Li Paper boards mould was used to increase the smooth level degree , while roughness of passage was decrease .
宝丽板