| 摘要 |
An axially elongated performed tube having a leading end and a trailing end. The tube is restricted at its leading end and open at its trailing end for the insertion of an adhesive and a ram to extrude the adhesive. The tube is selectively divided along its length into a plurality of porous axial sections, each section having a porosity different from that of its adjacent section, enabling selected distribution of the adhesive in selected areas.
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