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门993年7月一12月实用靳型专利)续丧国际专利分类号E03D9/052E03D9/052E03D9/08E03D9/08E03D 11/00E03D 11/02E03D 11/02E03D 11/02E03I〕11/02EO3D 11/04E03D 11/10公开号申请号2139601y2 150254Y2146522y92234119.293212602.292218559X2143245Y 93201461.52 1 5O259Y2 139602
July-December 1993 Practical Patent Types) International Patent Classification No. E03D9/052E03D9/052E03D9/08E03D9/08E03D 11/00E03D 11/02E03D 11/02E03D 11/02E03 I] 11/02 EO3D 11/04E03D 11/10 Publication No. 2139601y2 150254Y2146522y92234119.293212602.292218559X2143245Y 93201461.52 1 5O259Y2 139602