331
Repair and maintenance of fabricated metal products, machinery and equipment
6
小类
直属分类 · 6 项
3311
Repair and maintenance of fabricated metal products
3312
Repair and maintenance of machinery
3313
Repair and maintenance of electronic and optical equipment
3314
Repair and maintenance of electrical equipment
3315
Repair and maintenance of transport equipment, except motor vehicles
3319
Repair and maintenance of other equipment