搜索 - 科创

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由于喷口成型使用笔盖所以比较像是瓦拉喷口还可以自己做模具我拿粉笔用得比较少所以不太好看粉笔粉被压了之后就有一定强度了

10多年前上班时自编的一本培训教材，若是有兴趣想要需要了解通信的，可以学习一下，因为版权在原来的公司，所以未能提供word版本，请大家勿见怪！

（前言）既然搞到了硫酸镍，就得研究它的性质。在优酷看到了Ni离子鉴别的视频决心仿制一下，不过，又得去买镍试剂（丁二肟或叫丁二酮肟）看看自己快被撑爆的试剂柜和HX品保险箱.......无...

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