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Rubber ball main type: NBR Rubber ball, Nitrile Rubber ball, NR Rubber ball, CR Rubber ball, BUNA Rubber ball, SBR Rubber ball, EPDM Rubber ball, HNBR Rubber ball, SILICONE Rubber ball, VITON Rubber ball. Rubber ball precision achieved +/-0.02 to 0.001 mm, not gather the mold line, none the fragment...
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