8-10 pollices altae pressionis aeris DTH terebra
TheTerebra Kaishan DTHPraecipue adhibetur in exploratione geologica, fodina carbonis, conservatione aquae et energia hydroelectrica, viis publicis, ferriviis, pontibus, constructione et constructione, et cetera.
Proprietates Terebrarum DTH Altae Pressionis Aeris
1. Quinque formae principales terebrarum DTH: plana, convexa, celeris, concava. Omnes formae omnibus generibus petrae, durae, mollis vel abrasivae.
2. Maximam energiam terebrae DTH praebe, celeritatem terebrationis magnam et consumptionem aeris parvam propter structuram internam mallei seriei HD DTH secundum recentissimam theoriam terebrationis saxorum designatam.
3. Lenis effectus et longa vita utilis terebrarum DTH propter materiam chalybis mixti altae qualitatis et technologiam processus provectam aptatam.
4. Humilis problematum frequentia et facilis sustentatione propter simplicem, fidam et facilem compositionem et discompositionem structurae internae terebrarum DTH.
5. Facile est cuspidem dth a malleo separare propter filum multi-capitum mandrino et cylindro mallei connectentem.
| Fresa DTH altae pressionis aeris octo unciarum | ||||||
| Terebra | Diameter Capitis Terebrae (mm) | Numerus Clavis Spline | Bullae Gauge | Bullae Frontales | Pondus | Numerus Partis |
 | 203 | Duo | 10XΦ18 | 10XΦ16 | 40 | HD85-203 |
| 216 | Duo | 10XΦ18 | 12XΦ16 | 49 | HD85-216 | |
| 241 | Duo | 12XΦ18 | 18XΦ16 | 64 | HD85-241 | |
| 254 | Tres | 12XΦ18 | 21XΦ16 | 71 | HD85-254 | |
| CCCV | quattuor | 12XΦ18 | 29XΦ16 | 95 | HD85-305 | |
 | 203 | Duo | 10XΦ18 | 10XΦ16 | 37 | SD8-203 |
| 216 | Duo | 10XΦ18 | 12XΦ16 | 48 | SD8-216 | |
| 241 | Duo | 12XΦ18 | 18XΦ16 | 63 | SD8-241 | |
| 254 | Tres | 12XΦ18 | 21XΦ16 | 70 | SD8-254 | |
| CCCV | quattuor | 12XΦ18 | 29XΦ16 | 94 | SD8-305 | |
 | 203 | Duo | 10XΦ18 | 10XΦ16 | 35 | QL80-203 |
| 216 | Duo | 10XΦ18 | 12XΦ16 | 49 | QL80-216 | |
| 241 | Duo | 12XΦ18 | 18XΦ16 | 64 | QL80-241 | |
| 254 | Tres | 12XΦ18 | 21XΦ16 | 71 | QL80-254 | |
| CCCV | quattuor | 12XΦ18 | 29XΦ16 | 95 | QL80-305 | |
 | 203 | Duo | 10XΦ18 | 10XΦ16 | 35 | HM8-203 |
| 216 | Duo | 10XΦ18 | 12XΦ16 | 40 | HM8-216 | |
| 241 | Duo | 12XΦ18 | 18XΦ16 | 54 | HM8-241 | |
| 254 | Tres | 12XΦ18 | 21XΦ16 | 57 | HM8-254 | |
| CCCV | quattuor | 12XΦ18 | 29XΦ16 | 77 | HM8-305 | |
| Fresa DTH decem unciarum altae pressionis aeris | ||||||
| Terebra | Diameter Capitis Terebrae (mm) | Numerus Clavis Spline | Bullae Gauge | Bullae Frontales | Pondus | Numerus Partis |
 | 254 | Tres | 12XΦ18 | 20XΦ16 | 108 | SD10-254 |
| CCCV | quattuor | 12XΦ18 | 36XΦ16 | 125 | SD10-305 | |
| 311 | quattuor | 12XΦ18 | 36XΦ16 | 130 | SD10-311 | |
| 318 | quattuor | 12XΦ18 | 38XΦ16 | 142 | SD10-318 | |
| 330 | quattuor | 16XΦ18 | 42XΦ16 | CLV | SD10-330 | |
 | 254 | Tres | 12XΦ18 | 20XΦ16 | 90 | Numa 100-254 |
| CCCV | quattuor | 12XΦ18 | 36XΦ16 | 102 | Numa 100-305 | |
| 311 | quattuor | 12XΦ18 | 36XΦ16 | 104 | Numa 100-311 | |
| 318 | quattuor | 12XΦ18 | 38XΦ16 | 106 | Numa 100-318 | |
| 330 | quattuor | 14XΦ18 | 42XΦ16 | 112 | Numa 100-330 | |
