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Title:
【考案の名称】通気孔を有する二層管
Document Type and Number:
Japanese Patent JPH0627964
Kind Code:
U
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Inventors:
Ryo Koyama
Hiroshi Nishino
Application Number:
JP6240892U
Publication Date:
April 15, 1994
Filing Date:
September 04, 1992
Export Citation:
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Assignee:
Mitsubishi Plastics Co., Ltd.
International Classes:
E03C1/12; F16L39/00; (IPC1-7): E03C1/12; F16L39/00
Domestic Patent References:
JPH0374729A1991-03-29
Attorney, Agent or Firm:
Kumi Kondo



 
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