The article first puts forward an approximating hypothesis of arc on the rectified meniscus camber of color picture tube from actual conditions,it then sums up the experimental calculating formulae of meniscus camber in accordance with the operating principles of meniscus and advances calculation procedures and design methods of rectified meniscus.

Study on improving image quality with transmission attenuation correction;

An efficient method to rectify the distortion which exceed the acceptable standard of one hundred thousand cube meters tank's soleplate was introduced in the text.

This paper introduces the repair technique for nickel-aluminum bronze propeller and gives probe in detail to rectify and weld-mend to the propeller.

According to the teaching practice for many years,the psychology of disliking study to the "lagging students" during the time of studying in primary and secondary school and rectifying measurements are discussed.