non-preciousCOCA³¹⁵¹¹¹⁺⁴BNC¹⁷³⁹⁹⁵⁺² 基本例句 🌏非珍贵 Ni- Cr alloys, as the non-precious base- metal of porcelain-fused-to- metals, are and will be widely used in our country, especially in the inland, for their low cost. 由于价格低廉，贱金属烤瓷冠桥在国内尤其是内陆地区应用非常广泛，且将持续相当长一段时间，其中应用最多的贱金属底层为镍铬合金。 cnki