ZYBW_F type dry running vacuum pressure combined pump is the derivative product of ZYBW_E type pump.
镇江气泵zybw _ F型干式旋片真空压力复合气泵是ZYBW_E型气泵派生产品。
The GPL requires that any derivative product be similarly GPL’d and consequently that its source code be rendered freely available.
GPL规定任何衍生产品同样遵守GPL规则,因此,其源代码回赠人们自由使用。
So, product rule is OK for taking the derivative of a dot product.
那么乘积法则对点乘求导没问题。
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