トンネル坑内の換気方法 - Shimizu Construction Co., Ltd.

Title:

トンネル坑内の換気方法

Document Type and Number:

Japanese Patent JP4217959

Kind Code:

B2

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Inventors:

Masayuki Shimizu
Tsutomu Kiuchi
Hiroaki Tagawa
Toshihiko Wada
Masanori Suzuki

Application Number:

JP2003137218A

Publication Date:

February 04, 2009

Filing Date:

May 15, 2003

Export Citation:

Assignee:

Shimizu Construction Co., Ltd.

International Classes:

E21F1/00; E21F1/04; E21F17/103; F24F7/06; F24F7/08

Domestic Patent References:

Foreign References:

DE3041718A1

Attorney, Agent or Firm:

Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama

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