| 摘要 |
A method of bonding a valve stem assembly adapted to a rubber sheet which includes the steps of inserting the stem in a concave mold, surrounding one end of the stem with an uncured rubber ring, inserting a removable plug in the core of the stem, placing an imperforate rubber sheet over the plugged end of the stem, and applying heat and pressure to the assembly so as to mold the ring and sheet around the end of the stem. The plug is then pushed out of the core of the stem.
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