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发明名称
SAFETY DEVICE FOR EXCAVATOR FOR BOTTOM-EXPANDED PILE PIT
摘要
申请公布号
JPS637417(A)
申请公布日期
1988.01.13
申请号
JP19860149779
申请日期
1986.06.27
申请人
KITANAKA KATSUMI
发明人
KITANAKA KATSUMI
分类号
E02D5/44;E21B10/32;E21B11/00
主分类号
E02D5/44
代理机构
代理人
主权项
地址
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