缩面率

【机】 reduction of area

缩的英语翻译：

contract; crinkle; draw back; shrink; withdraw

面的英语翻译：

face; surface; cover; directly; range; scale; side
【医】 face; facies; facio-; prosopo-; surface

率的英语翻译：

frank; hasty; lead; modulus; quotiety; rash; rate; ratio; usually
【医】 rate
【经】 rater.