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overhead
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a.在头顶上的;架空的 ad.在头顶上
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详细解释：
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以下为句子列表：
英文: Metal halide gas-discharge lamps possess the advantages of small sige,high luminous efficiency,long life good start quality,simply appending power supply .They are widely use in movie projectors and overhead projectors etc.The metal-halide gas-discharge l
中文: 金属卤化物放电灯具有体积小、发光效率高、使用寿命长、启动性能好附加电源较为简单等优点,一般用于电影放映机、投影仪等仪器,品种有金卤灯（汞灯）、镝灯、钪钠灯、钠铊灯等.
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英文: SAITONG focuses on developing, manufacturing and selling overhead contact line systems, traction substation equipments, third rail systems etc.
中文: 公司主要设计、制造和销售铁路接触网系统、牵引变电所设备和城轨交通钢铝复合接触轨系统等。
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英文: SAMPLE OVERHEAD rises dramatically to acquire them. It normally costs much more in transportation and other costs than the motivation allowed by our razor-thin profit margins.
中文: 样品可以吸引对产品的需求，它一般在运输或其他方面的费用比我们制作它的成本费用高。
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英文: Set up the overhead projector in the meeting room.
中文: （准备好会议室的投影幻灯机。）
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英文: In the construction or renewal of grid,the effect of energy-saving and environment protection can be achieved through the reasonable choice of equipment and materials. This paper discusses the choice of transformers,overhead lines,cables and cable cleats.
中文: 在电网的建设或更新改造中,通过合理的选购设备与材料,可以达到节约能源、保护环境的功效,本文就变压器、低压架空线、电缆及线夹的选型进行了阐述。
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