black-heart malleable,black heart malleable cast iron是什么意思

用法例句

Applying a genetic algorithm and taking the maximum output as an objective function, a copper vapor laser with about 100?W output is optimized and designed for reducing the “black center” of the radial laser intensity.

应用遗传算法 ,以激光束径向光强无“黑心”的最大输出功率为目标函数 ,整体优化设计了百瓦量级铜蒸气激光系统的激光头以及放电电路 。

Aim To study depositing copper onto the surface of carbon fiber uniformly and overcoming the problem of poor wettability of carbon fiber by electrodepositing solution and the problem so called “black core”.

目的　研究碳纤维表面均匀镀铜的方法,解决镀铜时碳纤维与镀铜溶液的浸润性及碳纤维束的黑心问题方法　对碳纤维进行适当的表面处理,然后将化学镀和电镀结合使用在其表面镀铜,最后用扫描电镜(SEM)检验镀铜效果结果　较好地解决了碳纤维与镀铜溶液的浸润性及碳纤维束的黑心问题结论　对碳纤维先进行化学镀再电镀,既可提高碳纤维与铜镀层的结合力,又可获得较厚的镀

After 6 months of low temperature storage,the core browning incidence and index was about 26.

结果表明,GSH能有效抑制鸭梨果实在低温贮藏6个月后黑心病的发生,处理果的黑心率及黑心指数分别比对照果降低了26。