Choi S. Lee J. Guo F Creep properties of eutectic SnAg solder and Sn- Ag composite solders containing intermetallic particles.

史耀武。闫焉服。刘建萍金属颗粒增强的锡铅基复合钎料及其制备方法。

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Then T is an invertible linear operator preserving rank - partial ordering on Sn(F) if and only if there exists an invertible matrix (F) such that where .

刻画了在非负无零因子交换半环上强保持可逆矩阵的线性算子。

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