非金属-金属转化
nonmetal-metal transition
活塞环金属填料
metallic piston rod packing
金属-金属髋关节假体
Metal-on-metal hip prostheses
金属填料
metal fill
metal fillers
metallic filling
metallic stuffing
metal filler
metal powder component
metallic packing
metal-jointing (metallic packing
metal packing
packing
metallic