Machine shops (for engine parts) are like that in my area. They aren't in the nicest parts of town, no one wears glasses and no smoking ordinances don't apply to them.
I wonder how many cabinets they are producing a day? 10? 100? 1,000? I didn't realize the demand was that great.
At least the shop above seems to keep the floor clean!
Does anyone care to opine if all of the cabinets are going towards amplifiers and power supplies or are there other uses???