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B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
Dispositif d'ouverture/fermeture notamment pour contenant a paroi souple et contenant a paroi souple et embout tubulaire associes a un tel dispositif
Manual dispenser for small vol. of sterile liquids - includes flexible bag holding liq. which collapses as liq. is removed to prevent ingress of non-sterile ambient air