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elements of centering
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elements of centering
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大地起算数据
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elements of centering
归心元素
仪器、照准目标和标石的中心在水平面上投影间的距离及其与零方向的夹角。测站点归心元素包括测站点偏心距与偏心角;照准点归心元素包括照准点偏心距与偏心角。
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airstream
airstream mechanism
air stripping process of wastewater
air-suction seeder
air-suction seed-metering device
air supply module
air supply of instrumentation and control
air supply of launcher
air supply respirator
air supply vehicle
air surveillance radar
air system and water system
air table
air tape sampler
air temperature control
air texturing
air texturing yarn machine
air thrawing equipment
air tightness of high speed train
air tight test
airtight transportation
air-to-air heat exchanger
air-to-air missile
air-to-air missile flight phase
air-to-air missile warhead
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