| 摘要 |
PCT No. PCT/US92/02030 Sec. 371 Date Sep. 28, 1993 Sec. 102(e) Date Sep. 28, 1993 PCT Filed Mar. 13, 1992 PCT Pub. No. WO92/18252 PCT Pub. Date Oct. 29, 1992.A masking element comprising a foam web formed into a closed curve defining upper and lower surfaces with a layer of adhesive on at least its lower surface for mounting the element on a substrate.
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