Using self-prepared sodium naphthalide solution,PTFE micropore membrane was modified to improve its wetness and adhesiveness.
用自制
钠—萘处理液,改性聚四氟乙烯(PTFE)微孔膜,改善薄膜表面
润
性和粘合性。
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'She was my grandmother, ' said Elfride, vainly endeavouring to moisten her dry lips before she spoke. Elfride had then the conscience-stricken look of Guido's Magdalen, rendered upon a more childlike form.
“她是我的祖母,”Elfride 说,在她说话之前徒劳地试图
她干燥的嘴唇。 Elfride 那时有 Guido 的 Magdalen 的良心震惊的外观,呈现在更孩子气的形式上。
51. Question: How does the cleanliness of the PCB surface impact the soldering process in PCBA? Answer: A dirty PCB surface can prevent proper wetting of the solder, leading to poor solder joints, increased resistance, and possible electrical failures.
51. 问题:PCB 表面的清洁度如何影响 PCBA 中的焊接过程?答案: 肮脏的 PCB 表面会妨碍焊料的
当
,从而导致焊点不良、电阻增加和可能的电气故障。