POLYBUTADIENE is validvalid

a synthetic rubber that has a high resistance to wear and is used esp. in the manufacture of tires

183,661 of 196,601 in NWL2023·also valid in CSW24

a synthetic rubber that has a high resistance to wear and is used esp. in the manufacture of tires

184,517 of 280,887 in CSW24·also valid in NWL2023

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