1. BY-40 vehicle gear oil channeling point tester
2. BY-37 mineral oil oxidation characteristic tester
3. BY-35 crankcase simulation tester
4. BY-32 air release value tester for lubricating oil
5. BY-31 lubricating oil evaporation loss tester (NOAK method)
6. BY-30 dark petroleum sulfur content tester (tube furnace method)
7. BY-28-2 automatic lubricating oil oxidation stability tester
8. BY-25C special anti emulsification centrifuge
9. BY-25 Alubricating oil demulsibility tester
10. BY-25 demulsifier for petroleum and synthetic liquids TAG：