预先考察 meaning in English

preconsideration

In view of the influence of coating procedure , preferable concentration of the coating solution was selected by evaluating the different coating effect , and it was adopted in the production process of the artificial tracheal samples
考虑到涂层工艺对人工气管性能的影响，在试样制备前本课题预先考察了不同浓度涂层剂溶液的涂层效果，并以此为依据选择了效果较佳的涂层工艺用于人工气管试样的制备，保证了试样的可比性。