· Classification of oil pipe [2019-01-15 HITS：4]
Classification of oil pipe [READ]

· The price of welded steel pipe will increase by less than 10% [2019-01-10 HITS：5]
The trend of mine price will be relatively strong. It is expected that the price of welded steel pipe will increase by less than 10% [READ]

· What is the basic requirement of seamless steel pipe? [2019-01-08 HITS：16]
What is the basic requirement of seamless steel pipe? [READ]

· How do spiral steel pipe prevent rust? [2018-12-27 HITS：2]
How do spiral steel pipe prevent rust? [READ]

· The price of J55 oil pipe keeps rising [2018-12-25 HITS：12]
The price of J55 oil pipe keeps rising [READ]

· Welded steel pipe prices have shown a more obvious rebound [2018-12-20 HITS：5]
Welded steel pipe prices have shown a more obvious rebound [READ]