| 摘要 |
An inlet end wall of the cartridge has an outer peripheral annular rib (26) which surrounds a perforated region (20) and can be engaged under mechanical pressure by a heated plate (P) for introduci ng hot water into the cartridge. The annular rib (26 is made of a plastics material, such as polypropylene, which can be softened at the temperature to which the water delivery plate (p) is heated.
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