DUCT COVER
- 专利权人:
- DUCT & ACCESS COVERS LTD
- 发明人:
- 申请号:
- GB19920001351
- 公开号:
- GB9201351(D0)
- 申请日:
- 1992.01.21
- 申请国别(地区):
- 英国
- 年份:
- 1992
- 代理人:
- 摘要:
- 来源网站:
- 中国工程科技知识中心
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