Post office box (electricity)
http://dbpedia.org/resource/Post_office_box_(electricity)
The post office box was a Wheatstone bridge-style testing device with pegs and spring arms to close electrical circuits and measure properties of the circuit under test.
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PO箱（Post Office box）はホイートストンブリッジによる電気抵抗計測器の一種。
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PO箱
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Post office box (electricity)
xsd:integer
21324929
xsd:integer
1103509111
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The post office box was a Wheatstone bridge-style testing device with pegs and spring arms to close electrical circuits and measure properties of the circuit under test.
rdf:langString
PO箱（Post Office box）はホイートストンブリッジによる電気抵抗計測器の一種。
xsd:nonNegativeInteger
2358
