ប្រភេទ PISTON ផ្លាស់ប្តូរយ៉ាងរហ័សនូវឧបករណ៍ប្រកាស និងឧបករណ៍កាន់
| ធាតុ NO. | ឈុតនីមួយៗរួមបញ្ចូល | |
| 551-100 | 250-100-00 | 250-100, 250-101, 250-102, 250-104, 250-107, 250-110 |
| 551-200 | 250-200-00 | 250-200, 250-201, 250-202, 250-204, 250-207, 250-210 |
| 551-300 | 250-300-00 | 250-300, 250-301, 250-302, 250-304, 250-307, 250-310 |
| 551-400 | 250-400-00 | 250-400, 250-401, 250-402, 250-404, 250-407, 250-410 |
