第一副族的金属在所有金属中具有最高的导电和导热性。
The Group 1b metals have the highest electric and thermal conductivity of all metals.
第一副族的金属很难被氧化，但反过来，第一副族的金属离子很容易被还原成自由金属。
The metals of the Group 1B are difficult to oxidize, but in turn their metal ions are easily reduced to the free metals.
其次，对作动器的滚珠直族副、滚珠花键副、滚珠卸荷副分别进行了赫兹接触共振分析，计算出接触共振频率；
Next, carries Hertzian contact resonance analyses to ball straight-rotary pair, ball spline pair and ball unload pair, calculates contact resonance frequencies.
其次，对作动器的滚珠直族副、滚珠花键副、滚珠卸荷副分别进行了赫兹接触共振分析，计算出接触共振频率；
Next, carries Hertzian contact resonance analyses to ball straight-rotary pair, ball spline pair and ball unload pair, calculates contact resonance frequencies.
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