English 
Machining multiple independent or connected cavities into a single part essentially replaces functional integration that would otherwise require assembling several separate components — reducing assembly steps and the risk of missed parts, but at the cost of significantly higher machining difficulty. Tool accessibility becomes a direct constraint in deep or narrow cavities, where even moderate tool overhang causes chatter marks, while relative positional accuracy between cavities determines whether downstream modules mate correctly — demanding higher multi-axis coordination and careful tool selection.
