火车站就在附近，隔几个街区就到，坐落在峡谷边缘的黑暗角落里，而进站方向的铁轨在琥珀色的蒸汽灯照耀下却显得灯火通明。
At the distance of a short city block stood the train station perched in darkness on the edge of the ravine, while below the tracks were illuminated in the amber glow of vapor lamps.
可以采用汽灯，因为此种灯能产生具有不同特征波长的光。
Vapour lamps can be used since they produce light of different characteristic wavelengths.
用途：用于镧钨、镧钼阴极材料，三元催化剂，石油化工，汽灯纱罩添加剂，硬质合金，难溶金属等。
Uses: used Lanthanum tungsten, lanthanum molybdenum cathode materials, ternary catalysts, petrochemicals, gas lamps mantle additives, alloy, refractory metals.
用途：用于镧钨、镧钼阴极材料，三元催化剂，石油化工，汽灯纱罩添加剂，硬质合金，难溶金属等。
Uses: used Lanthanum tungsten, lanthanum molybdenum cathode materials, ternary catalysts, petrochemicals, gas lamps mantle additives, alloy, refractory metals.
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