| 摘要 |
<p>PROBLEM TO BE SOLVED: To produce condom of low sense obstruction while keeping mechanical and retentive strength, by an easy and efficient method. SOLUTION: This condom comprises thin trunk 8 and lower part 9 and the thick connecting portion of the trunk 8 and the lower part 9 of a preform 6. The condom 10 is formed by injection of a liquid into the preform 6, or otherwise by treatment with hot air, to yield permanent deformation. The root portion of the condom 10 is made thick and the tip portion is made thin. The condom 10 is formed of a silicone.</p> |
