PROCEDEU SI DISPOZITIV PENTRU FABRICAREA TEVILOR CU ARIPIOARE TRANSVERSALE
摘要
<p>A method and apparatus of forming ribbed pipes, after an initial pipe restressing in which bending of the rib of the plane perpendicular to the rolled pipe axis takes place, and straightening of the rib thenafter. Then on duplex metal pipes, the outside pipe is additionally compressed to the core pipe.</p>
申请公布号
RO78178(A)
申请公布日期
1982.02.01
申请号
RO19780092969
申请日期
1978.01.20
申请人
ZAKLAD DOSWIADCZALNY PRZY ZAKLADACH URZADZEN CHEMICZNYCH "METALCHEM",PL
