У цэлым,
the shape of these parts, the structure than the previous three parts complex, and the processing position changes more. Such parts are generally valve body, pump, reducer box and other parts. In the choice of the main view, the main consideration of the work position and shape features. When other views are selected, appropriate auxiliary views such as cross-section, section view, partial view and skew view should выкарыстоўвацца ў адпаведнасці з фактычнай сітуацыяй, каб выразна выказаць унутраную і знешнюю структуру частак .