Hello, lubricating oil belongs to the fourth category 0401in the trademark classification; Construction machinery parts belong to the seventh category in trademark classification. What subcategories do you need specifically? You should be clear about what you mainly do. Rubber products belong to category 17 170 1 and hardware products belong to category 6, category 0607. 040 1 industrial grease, lubricating oil, lubricant (excluding fuel oil), anti-skid agent for transmission belt 040009, shoe grease 040026, leather grease 040034, industrial grease 040035, demoulding oil (for building) 040036, animal grease 040037, petroleum ether 040044, industrial Oil 040055 for masonry protection, non-edible fish oil 040057, soybean oil 040058 for stove sticking prevention, heavy oil 040064, industrial vegetable oil 040065, naphtha 040066, industrial bone oil 040067, refined oil 040068, petroleum (crude oil or refined oil) 04007 1. Industrial sunflower oil 040075, mixed xylene 040077, xylene 040078, textile oil 040080, benzene 040082, crude benzene 040083, leather protectant (grease) 040086, industrial oil 040087, industrial castor oil 040089, leather protectant oil 040090 and cutting fluid. Paint oil 040 102, engine oil 040 104, petroleum volatile oil 040 10※ Tung oil C04000 1, wood oil C040002, stillingia oil (i.e. green oil) C040003, camphor oil C04003. Olive oil (for industrial use) C040007, emulsified oil C040008, clock oil C040009, sewing machine oil C0400 10, gun cleaner oil C04001,dual-purpose oil for record player C0400 12, microscope. Hardening oil C0400 15, solvent oil C0400 16, precision instrument oil C0400 17, cutting oil C0400 18, belt oil C0400 19, and wheel anti-skid paste c040000. Motors and engines (except land vehicles); Machine couplings and transmission parts (except land vehicles); Non-manual farm tools; Incubator; Vending machine 170 1 rubber not belonging to other categories, gutta percha, rubber gum 1700 10, raw rubber or semi-finished rubber 1700 17, unprocessed or semi-finished rubber/kloc-0. Latex (natural rubber)/KOOC-0/70064, liquid rubber/KOOC-0/70/KOOC-0/3, rubber water/KOOC-0/70/KOOC-0/KOOC-0/40607 Metal washer for nails and standard fasteners 060037. Gasket (gasket) 060063, metal bolt 060078, metal cotter pin 060082, nail 060085, corner nail 060086, flat head nail 060086, metal expansion bolt 060087, metal hook (fastener) 060 102, metal fastener (hook) 060. Pin (hardware) 060 14 1, eyebolt 060 143, eyebolt 060 143, climbing nail 060 149, metal rivet 0602 17. Hardware *060227※ Keypin C060025, vehicle fastening screw C060039 Note: Products protected across similar groups: hardware (0607,0608,0609); Hardware (0607, 0608, 0609).