NF L22-556-1985 Self-locking anchor nuts miniature series single lug Classification 900 MPa 235 degrees C and 425 degrees C ISO thread 《等级为900 MPa 235℃和 425℃、单耳小型系列自锁防松螺母 ISO螺纹》.pdf

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ITU-R RAPPORT M 766-2 FRENCH-1990 Feasibility of frequency sharing between the GPS and other services《全球定位系统和其他服务之间的频率共享的可行性》.pdf

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