测面器

planimeter

测的英语翻译：

infer; measure; survey

面的英语翻译：

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

器的英语翻译：

implement; organ; utensil; ware
【医】 apparatus; appliance; crgan; device; organa; organon; organum; vessel