Comparison between the methods adopted in traditional workmanship procedure and the improved one shows the common points and different points of the two kinds of workmanship procedures,and influence for the ship period.

The paper briefly introduces the characters of warm extrusion and emphases on application advantages for parts of aluminum alloy shells and influencing factors on technological process.

In view of the characteristics of technological process in chemical plants,it is suggested that the identification of hazards and dangers in this kind of plants should be achieved by combining the method of HAZOP(hazard and operability study) on the basis of direct-viewing and empirical analysis and system safety analysis.

The technological process, principles and the key points of technology controlling of the thermosetting plastic by using the fusible core injection moulding were described.

Introduces frame and design parameter of the bidirectional boring machine, compares and analyzes technical process that load assembly has been manufactured at the bidirectional boring machine or no, explains the bidirectional boring machine characteristics and significance in manufacture of hydraulic support.

Introduces the technical process of hydraulic support cylinder bore enlarge,and give checking strength for it.

Firstly, the article mainly introduces the working principle and characteristic of Selective Laser Sinter (SLS) technology and explains the technical process of SLS system with schematic.