This equipment is designed to detect the air tightness of the welding of the bottom cover and the welding of the spring plate of the automobile shock absorber liquid storage cylinder assembly. The leak test type is a steel pipe with an oblique vertical semi-submersible design. After the workpiece is placed in the water and sealed, the compressed air is filled into the assembly, and the workpiece's air tightness is judged by

observing air bubbles on the water surface. Delay control can be set for the detection time of airtightness sinking.