材料，内蕊使用高强度锌合金精致而成，外壳采用不锈钢冲压而成。
The material and core are made of high strength zinc alloy after casting, and the case is made of stainless steel after stamping.
材料，内蕊使用高强度锌合金精致而成，外壳采用不锈钢冲压而成。
The material and core are made of high strength zinc alloy after casting, and the case is made of stainless steel after stamping.
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