| 摘要 |
Nozzle ( 1 ) for injection moulding of plastic materials, comprising a generally cylindrical body ( 2 ) with spiral-shaped groove ( 4 ) on the external surface, in which a first and a second heating resistor ( 5, 6 ), which are independent from each other and which are equipped with respective autonomous controlling thermocouples ( 7, 8 ), are wound.
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