Based on the optoelectronics theory, the experiment device is designed, which is composed of pulse generator, LD light source, 1×3DQ, adjustable CTB, testing optic fiber, intervening light filters, fast micro-light watt-meter and data analysis system. The technology of optic fiber Raman scattering is analyzed for its application to temperature testing of railway engineering.

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watt-meter：瓦特計(jì),功率計(jì)

watt瓦特,瓦 | watt-meter瓦特計(jì),功率計(jì) | wave波

watt-meter：瓦[特]計(jì),電力計(jì)

木工車床 wood lathe | 瓦[特]計(jì),電力計(jì) watt meter | 洗滌機(jī),洗衣機(jī) washing machine

watt-meter：瓦特計(jì)

watt meter 電表 | Watt meter 瓦特計(jì) | watt per candle 瓦特燭光

watt-meter：瓦計(jì),電力計(jì)

53 木工車床 wood lathe | 54 瓦計(jì),電力計(jì) watt meter | 56 水表 water meter

watt-meter; wattmeter：瓦特計(jì)

wattless load 無功負(fù)載 | watt-meter; wattmeter 瓦特計(jì) | watt-minute 瓦分