- Machinery, Supplies & Equipment - Business Production Related, Ardrossan
- Machinery, Supplies & Equipment - Business Supplies Related, Ardrossan
- Machinery, Supplies & Equipment - Construction & Contractor Related, Ardrossan
- Manufacturing, Ardrossan
- Manufacturing & Industrial Consultants, Ardrossan
- Manufacturing Products, Ardrossan
- Masonry Materials & Supplies, Ardrossan
- Massage Therapists & Professional, Ardrossan
- Massage Therapy, Ardrossan
- Meat Market, Wholesale & Products, Ardrossan
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- Meat Packers, Ardrossan
- Membership Sports & Recreation Clubs, Ardrossan
- Mental Health Specialists, Ardrossan - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Heat Treating, Ardrossan
- Millwork Contractors, Ardrossan
- Miscellaneous Personal Services, Ardrossan
- Miscellaneous Professional, Ardrossan
- Motor Vehicle, Ardrossan
- Moving Companies, Ardrossan
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