Hardware lock purchase points analysis

Market classification of metal lock material complicated, diverse processing technology, and specifications vary, then how to pick the door hardware locks, small series finishing a number of hardware manual, which is how to choose a hardware lock for a detailed description.

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Export advantages of construction machinery are still obvious


Under the grim situation in which the domestic market was sluggish and the demand in the international market weakened, in 2012, the total export value of construction machinery was 18.224 billion U.S. dollars, a year-on-year increase of 14.48%. From the perspective of the international e

Shanghai developed the largest domestic special semi-trailer


The two 120-ton special semi-trailers with the largest volume and the largest load in China were successfully developed at Shanghai Power Environmental Protection Equipment General Factory. Through heavy-duty driving tests, all performance and major technical indicators meet the design re

Disadvantages of old traction motors


One of the reasons why the traction motor uses a complicated structure is to minimize the impact force acting on the traction motor. The traction motor is mounted on a bogie frame with minimal impact, and a damping spring is placed between the wheelset and the bogie frame. This results in

Introduction to the design of hardened gears


The transmission process of gears and gearboxes is a complex movement process. The problems encountered in the production of wire and bar mills are: noise, vibration, impact, broken teeth, tooth surface pitting, etc. This reflects the gears. There are two basic aspects to the evaluation of

The United States has developed a new metal 3D printing process

Recently, the famous US application lab Lawrence Livermore National Laboratory (LLNL) and the United States well-known private research University of Worcester Polytechnic Institute to develop a new metal 3D printing process - direct metal writing (Direct Metal Writing ).

Analysis of the development trend of China's LED packaging equipment industry


The semiconductor lighting industry is considered to be an important means of transforming the economic development mode, adjusting the industrial structure, driving the development of related industries, and achieving sustainable development. It is also one of the most strategic emerging

Superheated steam temperature control system optimization

At present, the temperature of superheated steam for large-capacity high-parameter boilers manufactured in various countries around the world is mostly controlled at 540°C or higher. In order to ensure the safe and economical operation of the steam turbine, under the specified load, a higher