... Specifications: Diameter: 8 ≤ Φ273mm Tube length: 2 ~ 24m2. the test pressure: 10 ~ 100Mpa3. the holding time: 5 ~ 30 seconds (can ... description:1. the manufacturing level: the introduction of automatic hydraulic test unit received, Germany, Japan, the type of unit technology, ... body frame structure, even by force, the test pressure;2.2 hydraulic test machine radial clearance seals, sealing, and long ...