China Coal Group Sent A Batch Of Metal Roof Beams To Shaanxi Province
On April 5, a batch of metal roof beams produced by China Coal Group is sent to Shaanxi. At present, DFB (1400-4400 standard specifications)/300, DJB600/470, DJB800/420, DJB (1000, 1200)/300 metal roof beams independentl...