black film

• 黑膜

black film的用法和样例：

例句

1. The effect of lactic acid on eliminating black membrane of beef omasum is studied in this paper.
   本项试验对乳酸在牛百叶脱黑膜工艺中的作用效果进行了研究。
2. A newly developed blackening process which fitted for blackening of different stainless steel was introduced.The factors affecting the quality of the film were discussed.
   摘要介绍了一种适合不同种类不锈钢发黑的新工艺，讨论了配方成分和工艺参数等对发黑膜的影响。