2023-03
Chinas continental shale oil exploration and development has made important progress in many fields, but it still faces multiple challenges and needs further…
2023-03
On March 7, 2023, the 11th China (Shanghai) International Fluid Machinery Exhibition hosted by China General Machinery Industry Association (hereinafter refe…
2023-03
Hard seal butterfly valve means that both sides of the sealing pair are metal materials or harder other materials, which are called "hard seals". T…
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