| 摘要 |
A closure device for sealing the opening of a refillable container, the closure device including spaced pressure members having a soft resiliently deformable washer member sandwiched therebetween, and a tightening member engageable with a neck portion of one of the pressure members for drawing the pressure members together. Tightening apparatus for the closure device includes a wrench engageable with the tightening member and a key member engageable with the pressure member neck portion for holding the closure device in fixed position during movement of the tightening member by the wrench.
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