Acoustic characteristic testing device for light and thin structure
Closed rotation angle detection device for erecting test of oil passing valve
Container cargo ship cabin container testing tool and container testing method
Multi-stage buffer heat suppression structure for high-orbit space telescope
Overload and service life detection system for hoisting machinery
Slope displacement monitoring device in pile foundation excavation process
Stable-descending vertical falling speed measuring device for air-drop test
Vehicle air conditioner control method and device, computer equipment and storage medium