boss boltwheel boltswheel hub bolt的意思|示意

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凸台螺栓轮毂螺栓

轮毂螺栓 ... 尖头螺栓: clasp boltfin neck boltni ed boltnibbed boltpointed boltspiked bolt 轮毂螺栓: boss boltwheel boltswheel hub bolt 空心螺栓: banjo bolt ...