すなどけい
砂時計
1. hourglass
2. HourglassAn hourglass (sandglass, sand timer, sand clock, egg timer) measures the passage of a few minutes or an hour of time. It has two connected vertical glass bulbs allowing a regulated trickle of material from the top to the bottom. Once the top bulb is empty, it can be inverted to begin timing again. The name hourglass comes from historically common hour timing. Factors affecting the time measured include the amount of sand, the bulb size, the neck width, and the sand quality.
Read “Hourglass” on English Wikipedia
Read “砂時計” on Japanese Wikipedia
Read “Hourglass” on DBpedia
Read “Hourglass” on English Wikipedia
Read “砂時計” on Japanese Wikipedia
Read “Hourglass” on DBpedia
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