1. YA-100 ammonia pressure gauge 2. YA-150 ammonia pressure gauge 3. YE-150 capsule pressure gauge 4. YE-75 capsule pressure gauge 5. YE-100 capsule pressure gauge 6. YZS-102 double needle double tube pressure gauge 7. Y-40 spring tube pressure gauge 8. Y-40Z spring tube pressure gauge 9. Y-60 spring tube pressure gauge 10. Y-60Z spring tube pressure gauge TAG：