Title:
【考案の名称】内、外管の間隔保持用スペ-サ
Document Type and Number:
Japanese Patent JPS58177675
Kind Code:
U
Inventors:
Hideo Iida
Application Number:
JP7346482U
Publication Date:
November 28, 1983
Filing Date:
May 21, 1982
Export Citation:
International Classes:
F16B3/00; C23F15/00; F16L7/00; F16L55/18; (IPC1-7): F16L7/00; C23F15/00; F16B3/00; F16L55/18