|
US4697446A
(en)
|
|
Roll forming apparatus
|
|
US3075484A
(en)
|
|
Method of and apparatus for continuously producing small section welded steel tubes
|
|
US3159199A
(en)
|
|
Cluster roll assembly for tube mills
|
|
CN215432003U
(zh)
|
|
一种用于钢管加工的焊接装置
|
|
SU159159A1
(https=)
|
|
|
|
US2729180A
(en)
|
|
Spiral pipe machine
|
|
US4070887A
(en)
|
|
Roll former for tube mill
|
|
US4501948A
(en)
|
|
Method and apparatus for forming spiral tubing
|
|
US3093103A
(en)
|
|
Method of producing spiral pipe
|
|
US2635572A
(en)
|
|
Tubemaking apparatus
|
|
US5148960A
(en)
|
|
Rotary seam guide
|
|
US1984083A
(en)
|
|
Manufacture of sheet metal tubes
|
|
US2563214A
(en)
|
|
Pipe-making machine
|
|
US3078818A
(en)
|
|
Method of compensating for the effect of cambered strip stock in making helical seam metal tubing
|
|
CN222970647U
(zh)
|
|
一种螺旋焊管成型器轨道自适应调节装置
|
|
US3170427A
(en)
|
|
Strip edge guide device for tube mills
|
|
CN103764308B
(zh)
|
|
小径金属管的制造方法以及制造装置
|
|
US5673579A
(en)
|
|
Welded steel pipe manufacturing apparatus and method
|
|
US1523927A
(en)
|
|
Process and apparatus for making spiral tubing by electric welding
|
|
CA2243702C
(en)
|
|
Process and device for producing pipes as per the uoe-process
|
|
US1689374A
(en)
|
|
Machine for electrical-resistance welding of sheet-metal pipe
|
|
US1954679A
(en)
|
|
Resistance welding machine
|
|
CN218556023U
(zh)
|
|
一种薄壁焊管的板料传送定位装置
|
|
SU602245A1
(ru)
|
|
Способ продольной прокатки труб
|
|
SU863055A1
(ru)
|
|
Способ сварки пр мошовных труб
|