hard hat, supersonic aircraft protection ZS-3 GS-4MS, 1st production sample, used by test pilots, and in line units when flying the Su-9, Su-11, MiG-21, USSR, 1965
article: | hard hat |
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title: | supersonic aircraft protection ZS-3 GS-4MS, 1st production sample, used by test pilots, and in line units when flying the Su-9, Su-11, MiG-21 |
country: | USSR |
year: | 1965 |
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