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перо

A device by which a spindle may be rotated and at the same time moved axially, as in the driving spindle of a bench drill in which the drill can travel to and from the work while spinning. It may take the form of a sleeve which does not itself rotate, but may be moved axially, usually having its outer surface machined with rack teeth to engage with the teeth of the feeding mechanism. The spindle is carried in bearings fixed inside the quill, and its driving end is provided with a long groove or keyway which engages with a corresponding key inside the bore of the pulley which rotates it.

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Izboljšaj
  • Besedna vrsta: noun
  • Sinonim(-i):
  • Blossary:
  • Industrija/področje: Chronometry
  • Category: Clock
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перо и мастило
Art history; General art history

Historically, drawings have been made by applying ink with a quill pen made by cutting the hollow stem of a large feather, from a bird such as a goose or a swan, to create a nib. ...

перо је моћније од мача
Language; Idioms

Идиом "перо је моћније од мача" значи да су речи и комуникација моћнији од ратова и борби.

механизми за мерење времена
Chronometry; Clock

All time measurements, whether by differential or integrative methods, originally required the attention of a watchman. The need for such attention only ceased when, besides ...

мерење времена
Chronometry; Clock

The presumed-unvarying flow of time is measurable differentially by observing a constant-rate process such as the movement of the sun's shadow on an equatorial sundial, or ...

тридесето-часовни сат
Chronometry; Clock

A clock which requires to be wound daily, with a margin of generally something over six hours to allow for a delay in rewinding. In particular, the name is associated with ...

земаљска кугла
Chronometry; Clock

A representation on a small scale of the main features of the Earth's surface, either purely geographical, showing continents, seas, islands, etc. , or political, showing national ...

телур
Chronometry; Clock

A mechanically operated model showing the revolution of the Earth around the sun, and of the moon around the Earth. An early example by Thomas Tompion and George Graham c. 1705 ...

стони сат
Chronometry; Clock

The earliest domestic clock was the hanging iron Gothic clock, but the application of the mainspring led to its being redesigned to make it portable. The earliest spring clock ...

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