| | Category | FR | Assembled part | Functional semantics |
| | Assembly regions | AR1 | {p1, p4, p5, p6, p7} | F1: sealing liquid | | F2: position pump cover | | F3: stabilize pump cover | | AR2 | {p1, p2, p3, p7} | F4: position-driven gear shaft | | F5: support-driven gear shaft | | F6: transform motion | | F7: supply liquid | | AR3 | {p3, p7, p8, p9} | F8: prevent liquid | | AR4 | {p1, p5, p6, p7, p15} | F9: fasten-pump cover | | AR5 | {p3, p11, p14} | F10: position driving gear | | F11: stabilize driving gear | | AR6 | {p3, p11, p12, p13} | F11: stabilize driving gear | | F12: fasten driving gear | | AR7 | {p3, p7, p9, p10} | F9: fasten pump cover | | F13: stabilize bush |
| | Flow-activity regions | FAR1 | p3: gear structure | F7: supply liquid | | FAR2 | p2: gear structure | F7: supply liquid | | FAR3 | p6: boss structure 2 | F14: export liquid | | FAR4 | p6: boss structure 1 | F15: import liquid | | FAR5 | p11: gear structure | F16: transfer torque | | F17: export liquid | | F18: transfer power | | FAR6 | p6: cavity structure | F17: export liquid |
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