This is a 1979 edition issued on April 1 , 1980, with a light purple background colour.

本劵为一九七九年版,于一九八零年四月一日发行, 以浅紫色作主色调.

互联网

Copying machine clean and no dust, no background colour is laid flat screen.

拷贝机保留肮不净、无尘埃 、 无污物是铺好底色陡网的先决前提.

互联网

This is a 1979 edition issued on April 1 , 1980, with a blue background colour.

本劵为一九七九年版,于一九八零年四月一日发行, 以蓝色作主色调.

互联网

This is a 1979 edition issued on April 1 , 1980, with a red background colour.

本劵为一九七九年版,于一九八零年四月一日发行, 以红色作主色调.

互联网