Watches
Watch Waterproof Tester Tool, Watch Waterproof Test Machine, Watch Pressure Tester, 6 ATM 2 Watches Case Resistance Pressure Test Machine
Principle: By pressurizing the sealed can, you can simulate the condition of the product to tens of meters under water. The pressure difference between the inside and the outside of the product is created after the pressure relief of the sealed box....
https://www.bizrate.co.uk/watches/watch-waterproof-tester-tool-watch-oid22185755773.html