CN104759888A
|
|
Manufacturing method of hot-rolled high-hardness petroleum pipe
|
CN104759833A
|
|
Method for manufacturing hot-rolled and precisely-rolled petroleum pipe
|
CN104759835A
|
|
Manufacturing method of hot-rolled high-precision petroleum pipe
|
CN104759834A
|
|
Hot-rolled high-strength oil pipe manufacturing method
|
CN104759832A
|
|
Manufacturing method of hot-rolled high-collapse-resistance petroleum pipe
|
CN103433281A
|
|
Ejector header cooling device of seamless tube perforating machine
|
CN103433283A
|
|
Pipe mill graphite core rod water blowing device
|
CN103433284A
|
|
Seamless steel tube mill retracting device
|
CN103433301A
|
|
Pipe mill skew roller feeding device
|
CN103433286A
|
|
Pipe mill core rod graphite lubrication and spraying system
|
CN103433288A
|
|
Rack of seamless steel tube stretch reducing machine
|