This paper introduces structure,main parameters,working principle of three_jaw hydraulic stripping attachment and its application.

Analysis of surveying nautical depth by three wings lead;

The theoretical analysis and experimental studies of the positioning and fixing for a disc type work in a three jaw chuck in turning operation are carried out in this paper,and the necessary conditions in which the positioning state of the work will be kept in the fixing process are given.

The article details the design and fabrication of the blanking die used to make three-joint plates on the distributor in hydrogen-processing reactors.