Beaker has lid with spout which contains valve held in position by secure mounting comprising tubular central section with flange at its base, hook inside spout fitting through curved slot on flange to lock it in place

摘要

The beaker has a lid with a spout. This contains a valve which is held in position by a secure mounting (16) comprising a tubular central section (18) with a flange (29) at its base. This has a curved slot (30), through which a hook inside the spout fits to lock it in place.