Maintenance and Calibration. (a) The microphone head of the sound level meter was cleaned with soft cloth at regular intervals.
Appears in 8 contracts
Samples: www.hzmbenpo.com, www.epd.gov.hk, www.epd.gov.hk
Maintenance and Calibration. (a) The microphone head of the sound level meter was cleaned with soft cloth at regular intervals.
Appears in 8 contracts
Samples: www.hzmbenpo.com, www.epd.gov.hk, www.epd.gov.hk