| 摘要 |
The stopper has two coaxial caps (1,2) with openings pointing in the same direction, of different diameter, and forming an annular space (3) between them. The inner cap (2) in the form of a snap-in cap is made of softer thermoplastic material than the outer cap. The caps are permanently joined by a connecting ring (9) which has the same hardness as the outer cap. The inner cap has an inward protruding sealing flange (7) resting on the sealing surface of the smaller diameter bottle. The inner cap has an outward protruding sealing flange (8) resting on the sealing surface of the large diameter bottle. The outer cap is in the form of a union nut with inner thread (4). |
