技术专栏
四层bga打样
3***3A
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<img src=‘/uploadfiles/image/20210622/1624330874611047469.png’ title=‘1624330874611047469.png’ alt=‘捕获.png’/><br />bga焊盘中有过孔为0.406mm,请问下在四层板30元打样中,过孔选择哪一项,还能30元打样吗?<br /><br/>