Study on Slow Wire Cutting Processes for Fine Pitch Gear;

Gear shaving is a process of high-efficiency on the gear precision work,but the tooth profile error of gear shaving is a hot issue.

The four processes in general use for recovering silver from silver nitrate solutions and them features are presented.

After studing the entire iron contents and component of the sulphurous iron ore residue,this program use wet process and take the sulphurous iron ore residue as raw material to prepare iron oxide red,omiting the step using the special use reducer to restore.

Traditional wet process of producing hydroxypropyl starch and the dry process used in this factory are described briefly.

The application of wet process is described in the preparation of lithium ion battery materials including anode and cathode material, diaphragm electrode, electrolyte, diaphragm material.

This paper introduces the technological method, technical characteristics and operation parameters of the units of desulfurization,dewatering and sulfur recoverying of imported 50×10~4m~3/d skidmounted natural gas purification equipment,discusses some technological problems and proposes some opinions.

At the same time,it introduces the technology features,the technique and die design,and so on.

By analysis of drawings,machining measures,this key problem is solved effectively through improving the requirement of valve seat size and machining techniques.

This paper introduces a new technique of one-off membrane making for copper tube of condenser, which can be done without many temporary systems.

Manufacturing CuSO4·5H2O directly from copper ores(or copper concentrates)by allwet technology is studied.