I endeavoured to unhasp the casement，but the hook was soldered into the staple.

去打开那窗子，但窗钩给在钩环里了。

Figure 5. Transfer efficiency of a solder paste related to aperture area ratio and its effect on reflowed bump co-planarity.

图5，高转移效率与孔面积比率及它对回流峰共面度影响。

The smaller mass of the solder spheres on the micropackage, coupled with a thin package, allows quick heat transfer through the component.

由于微型封装器件上料球质量较小，加上封装体较薄，热量传送通过器件速度很快。

In the production process of PCB, there are many defects such as surface smudginess, solder mask unevenness, text excursion, pad damage, track damage etc.

在印刷电路板生产过程中,会产生外观不整洁、阻不均匀、文字偏移、线路及盘破损等缺陷。