sealed against

• Electromechanical components for electronic equipment . basic testing procedures and measuring methods . part 12 : soldering tests . section 6 : test 12f : sealing against flux and cleaning solvents in machine soldering . european standard en 60 512 - 12 - 6
  电子设备的电机元件.基本试验过程和测量方法.第12部分:焊接试验.第6节:试验12f :机械焊接过程中耐液体和清洁溶剂的密封