预应力混凝土多孔板是我国中小型混凝土预制厂中产量最大的一种构件。以江苏省南京市第二构件厂为例:1981年全年产量为2.36万米~3,其中多孔板构件的产量为1.69万米~3,占全年产量的71.6%。预应力混凝土多孔板的生产,我国大多数中小型混 The prestressed concrete porous plate is the largest one among the small and medium-sized concrete precast plants in China. Take the second component factory in Nanjing, Jiangsu Province as an example: In 1981, the annual output was 23,600 meters~3, and the production of porous plate components was 16,900 meters~3, accounting for 71.6% of the annual output. Prestressed concrete porous plate production, most of the small and medium-sized mixed in China