[good news] tiefulai won the first batch of AAA credit enterprises in Henan Province in 2020

The theme of this summit is "new pattern and new challenges: enterprise reform and development", which aims to guide the majority of enterprises and entrepreneurs to grasp opportunities, meet challenges, accelerate the pace of reform, innovation, transfor

2021-07-07

Where are your products mainly sold? Is there a sales branch outside Henan?

Hello, our company's products are to serve the coal mine, mainly coal mine hydraulic drill, drill pipe, drill, damper and other equipment. Sold to major mines all over the country.

2021-07-21

What is the research mechanism of hydraulic punching

In view of the high risk of coal and gas outburst and the difficulty of gas drainage in soft, low permeability and high gas coal seam in China, this paper puts forward the methods of hydraulic punching, pressure relief and gas drainage,

2021-07-21