Method for chemical milling an apparatus with a flow passage

摘要

A method for manufacturing an apparatus (10) with a flow passage (44) includes providing a preform apparatus (110) with a preform flow passage (144). Flow area of the preform flow passage (144) is determined to provide determined flow area data. The determined flow area data is compared to reference flow area data to provide flow area comparison data. The preform apparatus (110) is chemical milled based on the flow area comparison data.