hearing safety awareness training
TRANSCRIPT
Chit ShweParticipant of CU4A10/04/2013
Noise Reduction Rating (NRR)
DEMONSTRATION ON WEARING OF HEARING PROTECTOION
THE END
TRANSCRIPT
Chit ShweParticipant of CU4A10/04/2013
Noise Reduction Rating (NRR)
DEMONSTRATION ON WEARING OF HEARING PROTECTOION
THE END