Variable inductors for RF stage(RF级可变电感)High stability(高稳定性)Available core materials: Carbonyl; Ferrites; Aluminum; Brass(可用的核心材料:铁氧体;铝;黄铜)Some products can be shielded with different kinds of metallic shield(有些产品可以用不同种类的金属屏蔽进行遮罩)