| 规格 | a(±2) mm |
b(±1.5) mm |
c(±3) mm |
d(±3) mm |
| C20-7F | 16mm | 10mm | 56mm | 32mm |
| C20-9F | 16mm | 11.5mm | 56mm | 32mm |
| C20-11F | 17mm | 13mm | 57mm | 33mm |
| 规格 | a(±2) mm |
b(±1.5) mm |
c(±3) mm |
d(±3) mm |
| C21-7F | 17mm | 11mm | 65mm | 40mm |
| C21-9F | 17mm | 12mm | 65mm | 41mm |
| C21-11F | 18mm | 15mm | 65mm | 41mm |
