alidade 的定义
Surveying.
- a straightedge having a telescopic sight or other means of sighting parallel to the straightedge.
- the entire upper part of a theodolite or transit, including the telescope, its supports, the level vials, the circle-reading device, and the spindle.
更多alidade例句
- Field artillery required a precision instrument known as the miniature telescopic alidade of the Gale type.
- A very simple alidade may be made by mounting two needles on a ruler.
- Close by stood an alidade, an instrument for measuring angles.
- After he had placed the plane table on a tripod and upon this the alidade, he started to work.
- The alidade is a triangular ruler with one or more working scales on it beside other measurements.