Occupational, Interior, Factory ‘A’ (metal works facility), Production Hall ‘A’, grinding metal parts (two different processes), clanking from metal parts. Industry, industrial, machinery, -3 dB, ZM-1-3E

Occupational, Interior, Factory ‘A’ (metal works facility), Production Hall ‘A’, grinding metal parts (two different processes), clanking from metal parts. Industry, industrial, machinery, -3 dB, ZM-1-3E