A valved bag of plastics material with a valve consisting of a sheet folded in the form of a tube and inserted and welded between the opposite sides of the bag, and process for manufacturing same
摘要
申请公布号
GB1032201(A)
申请公布日期
1966.06.08
申请号
GB19630009548
申请日期
1963.03.11
申请人
I.C.P.M. I¬INDUSTRIE CHIMICHE PORTO MARGHERA S.P.A.
