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1)  earth chord width
地球弦宽
1.
It has a 120° groove which simulates the earth chord width and a hot plate which simulates hot earth,and developed the cone scanning mode infrared earth simulator and the zone attitude simulator,which aim at the problems of simulation experiment,calibration and reliability test on earth surface of the cone scanning mode infrared earth sensor.
针对适用于低轨道卫星的圆锥扫描式红外地球敏感器地面模拟试验、标定和可靠性测试等问题,采用开有120°V型槽的扇形冷板模拟地球弦宽、金属热板模拟地球热源的方案,研制了圆锥扫描式红外地球模拟器和零姿态模拟器,其能模拟卫星在低轨道上看到的地球,提供120°地球弦宽
2.
This paper adopted a project of using a fan-shaped cold plate with a 120° groove which can simulate the earth chord width and a hot plate which simulates hot earth,developed the cone scanning mode infrared earth simulator,which aim at the problems of simulation experiment,calibration and reliability test on the earth surface of the cone scanning mode infrared earth sensor.
本文针对圆锥扫描式红外地球敏感器地面模拟试验、标定和可靠性测试等问题,采用开有120°V 型槽的扇形冷板模拟地球弦宽、金属热板模拟地球热源的方案,研制了圆锥扫描式红外地球模拟器。
2)  racket gut
球拍弦线
3)  tennis racket string
网球拍弦
4)  ellipsoidal chord distance
椭球弦距
5)  gut,string
(球拍的)弦
6)  racket strings;gut
球拍弦
补充资料:皮宽弦紧
皮宽弦紧 皮宽弦紧   病证名。指睑皮宽松,睑弦紧急,睫毛内倒的证候。《目经大成》卷二:“此症皆由患疾,妄称时眼,不以为意。或酒、或欲、或风霜,全不禁忌。致风邪深入,久而不瘳,然后内急外弛,皮宽弦紧,睫渐拳倒。未免泪出。”参见倒睫拳毛及内急外弛条。
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