535HP1368588253Months ago 75
In terms of steel billets: at :, some steel billets in Changli were reduced by , and the current car...
535HP1368588253Months ago 68
Disadvantages: Due to loose tissue and high pressure resistance, the pipe is only used to produce sm...
416HP1866021723Months ago 73
The best welding process parameters were selected, and the repeatability verification test was carri...
717HP1274435423Months ago 60
Therefore, there are requirements for the service environment of stainless steel, and it is necessar...
535HP1368588253Months ago 77
The excellent performance of copper pipe The copper pipe has the characteristics of and, which makes...
416HP1866021723Months ago 78
And tempering temperature to improve the corrosion and wear resistance. Some scholars use surface tr...
717HP1274435423Months ago 65
According to the purpose, it can be divided into oil well pipe (casing, oil pipe and drill pipe), pi...
535HP1368588253Months ago 65
In the middle and late ten days, although there were good news such as the rise of futures and the i...
965HP1139248653Months ago 63
the earthwork near the grouting pipe shall be excavated by the central trenching method to prevent...
632HP1955065913Months ago 70
The construction of cold storage in site selection bears the circulation of low-temperature goods. T...