无髓神经纤维unmyelinated nerve fiber
无髓的unmyelinated
无髓（神经）纤维neurofibra nonmyelinata【解剖】;non-myelinated nerve fiber【解剖】;unmyelinated nerve fiber【解剖】
无髓[神经]纤维unmyelinated nerve fiber, nonmyelinated nerve fiber
无髓的unmyelinated【组织】
无髓神经non-medullated nerve【解剖】;unmyelinated nerve【解剖】
无髓鞘的unmyelinated