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发明名称
A METHOD FOR MAKING A DRAINAGE PIPE WATERTIGHT,MECHANICALLY STRONG AND CHEMICAL-RESISTANT
摘要
申请公布号
ZA8904431(B)
申请公布日期
1990.08.29
申请号
ZA19890004431
申请日期
1989.06.12
申请人
ARDEL INTERNATIONAL S.A.
发明人
MARCEL HARTENSTEIN
分类号
E03F3/06;F16L55/165
主分类号
E03F3/06
代理机构
代理人
主权项
地址
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