· The specification and appearance quality of drill pipe [2016-02-02 HITS：1]
The specification and appearance quality of drill pipe [READ]

· Oil casing is a lifeline to maintain the oil well operation [2016-02-01 HITS：2]
Oil casing is a lifeline to maintain the oil well operation [READ]

· Oil pipe is a important equipment for oil drilling [2016-02-01 HITS：2]
Oil pipe is a important equipment for oil drilling [READ]

· carbon steel buttweld pipe fittings elbow tee reducer [2016-01-29 HITS：3]
carbon steel buttweld pipe fittings elbow tee reducer [READ]

· A pipe cross is a kind of pipe fitting [2016-01-29 HITS：0]
A pipe cross is a kind of pipe fitting [READ]

· There are a number of processes about erw pipes [2016-01-27 HITS：6]
　There are a number of processes that may be used to produce ERW pipes. Each of these processes leads to coalescence or merging of steel components into pipes [READ]