咨(zī)詢.熱(rè)線：
| type | features |
| fd 2 k 0 | basic type, setting range 2 – 10 mbarg |
| fd 6 k 0 | setting range 2 – 10 mbarg, with red signal lamp |
| fd 8 k 0 | setting range 2 – 10 mbarg, with green signal lamp |
| fd 2 k 1-7 | basic type, setting range 5 – 70 mbarg |
| fd 6 k 1-7 | setting range 5 – 70 mbarg, with red signal lamp |
| fd 8 k 1-7 | setting range 5 – 70 mbarg, with green signal lamp |
