traxxas和hpi升级避震芯是都是钢质,外有氮化钛涂层,从来没有什么“钛合金”避震芯! TITANIUM NITRIDE (TIN) SHOCK SHAFTS: These hardened, ground steel shafts have a super tough titanium nitride coating with a micro-polished finish that reduces stiction for smoother performance and resists scratching for much longer shaft life. The special hardened ground steel is extra strong to prevent bending |
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