えんちょく
鉛直
1. upright; vertical; perpendicular
2. Plumb-bobA plumb-bob or a plummet is a weight, usually with a pointed tip on the bottom, that is suspended from a string and used as a vertical reference line, or plumb-line. The instrument has been used since at least the time of ancient Egypt to ensure that constructions are "plumb", or vertical. It is also used in surveying to establish the nadir with respect to gravity of a point in space.
Read “Plumb-bob” on English Wikipedia
Read “鉛直” on Japanese Wikipedia
Read “Plumb-bob” on DBpedia
Read “Plumb-bob” on English Wikipedia
Read “鉛直” on Japanese Wikipedia
Read “Plumb-bob” on DBpedia
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