It became cheaper still when, after 1906, they could be extruded by perforated conveyorbelts a dozen at a time.
1906年，它们可以在有排孔的传送带上被压制生产，一次十二个，此后它变得更便宜。
2
Matrix codes on the backs of plates keep track of how long a sushi portion has been circulating on conveyorbelts; a small robotic arm disposes of any that have been out too long.