ഷെൻഹായ് സ്ഫോടനം-തെളിവ്
he validity of the explosion-proof certificate extends for 5 വർഷങ്ങൾ, and it can be obtained through third-party inspection agencies that have been authorized by the national government.
he validity of the explosion-proof certificate extends for 5 വർഷങ്ങൾ, and it can be obtained through third-party inspection agencies that have been authorized by the national government.