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Augmented reality (AR) is expected to be applied to manuals for assembling or inspecting tasks instead of traditional paper-based ones. Our previous study revealed that when an AR manual was experimentally used for a wiring task, efficiency became higher and human error decreased. However, in order to practically apply AR manuals in actual work situations, some human factor requirements should be clarified in advance. Thus, in this study, we attempted to make it clear what kinds of effects they had on performance by some conditions or restrictions. Particularly, we focused on the most popular human interfaces, see-through display (STD) and retinal scanning display (RSD), and aimed at showing how to properly and effectively use them in actual work situations.