The transparent and visual teaching equipment designed specifically for vocational colleges, universities, and enterprise training centers can complete a complete machine demonstration within 5 minutes in the classroom, helping students intuitively understand Pascal's principle, hydraulic transmission, and pressure area relationship. Manual lever pressurization (no power required, demonstration at any time). Teaching case: Pascal's principle verification: force of small piston 10 N → output of large piston 100 N; Energy conservation&efficiency: Compare input work and output work to calculate system efficiency; Safety valve demonstration: Automatic pressure relief and sound and light alarm for overpressure of 3.2 MPa; Sealing failure comparison: Two sets of different sealing rings are randomly attached, which can be quickly replaced to experience leakage differences.