Switch without wear and tear: the ball off the valve seat and then rotate, eliminating the friction ...
State Grid Corporation of China released statistical data on September 21, showing that th ...
As part of the US Environmental Protection Agency (EPA) Lisa Jackson’s commitment t ...
In the building materials market, the current wooden door brand Lin Lin has a variety of modern de ...
Abstract: China is the world's largest machine tool consumer, the largest machine tool import ...
At present, China's energy system mainly has the following problems: the decentralizat ...
Due to the increasing energy crisis and people’s inc ...
In this year's national "two sessions", the Minister of Industry and Information Te ...
Since 2011, the commodity market has remained at a high level of volatility. After nearly ...
Figure 1 Thin wall sleeve The processing of thin-walled deep-hole parts is difficult, especiall ...
On April 11th, the 12th China International Machine Tool Exhibition of CIMT2011 was officially op ...
1 Introduction Energy is an important material foundation for the existence an ...