常见例句19Is there a process to prehead PCB before potting black poly? 19 是否有密封黑色多晶矽之前預熱印刷電路板的流程?19 Is there a process to prehead PCB before potting black poly? 在融化黑塑之前是否有預熱PCB的処理？scaffolded prehead 有支架的前頭部 返回 prehead