film covering的用法和样例：
例句
- Business card printing and membership card making products holdout drying poor film covering quality does great harm.
制卡和会员卡制作品墨层干燥不良对覆膜质量危害极大。 - When sometimes covered with film silican drum the water or steam, this is due to a large number of paper after absorption.
覆膜时有时会发现硅胶滚筒上有明显的水滴或蒸汽，这是由于纸张吸收了大量水分后导致的。
