树脂凹缩 在镀覆孔孔壁与钻孔孔壁之间存在的空洞可以从经受高温后的印制板镀覆孔显微切片中看到
The voids where the resin shrinks between the walls of the coated holes and the drilled holes can be seen in the microsections of the coated holes on the printed circuit board after being subjected to high temperatures
以上为机器翻译结果，长、整句建议使用 人工翻译 。