Improvements in earth banking devices
- 专利权人:
- WILLIAM BOURGAIZE
- 发明人:
- 申请号：
- GB19580003420
- 公开号：
- GB844547(A)
- 申请日:
- 1958.02.03
- 申请国别(地区):
- 英国
- 年份:
- 1960
- 代理人:
- 摘要：
- 来源网站：
- 中国工程科技知识中心
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