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Hand feed
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A drill machine in which the rate at which the bit is made to penetrate the rock is controlled by a hand-operated ratchet and lever or a hand-turned wheel meshing with a screw mechanism.
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Controlled, английский
- Управляемый; регулируемый
- Управляемый
- Подконтрольный (о предприятиях)
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Hardness test, английский
A determination of the relative hardness of a mineral, as made on a specimen, using appropriate hardness-testing apparatus and techniques. see hardness and hardness scale.
Half-turn socket, английский
A borehole fishing tool having jaws bent in a half circle to engage lost tools that lean to one side in a borehole.
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