Title:
【発明の名称】還元井の目詰まり深さ及び目詰まり量の測定方法
Document Type and Number:
Japanese Patent JP2879612
Kind Code:
B2
Inventors:
MYAKE NORIJI
TAMAOKI KATSUYUKI
AMANO MASARU
KOSAKA NOBUAKI
TAMAOKI KATSUYUKI
AMANO MASARU
KOSAKA NOBUAKI
Application Number:
JP4939191A
Publication Date:
April 05, 1999
Filing Date:
March 14, 1991
Export Citation:
Assignee:
SHIMIZU KENSETSU KK
International Classes:
E03B3/15; E21B37/00; E21B43/00; (IPC1-7): E21B43/00; E03B3/15
Domestic Patent References:
| JP53115551A |
Attorney, Agent or Firm:
Yoshinori Yanagita (8 outside)