| 摘要 |
FIELD: elastic members of machines and devices, members of building structures. SUBSTANCE: corrugated envelope has corrugations passing along two mutually normal directions - longitudinal and cross at relation of corrugation depth of cross direction to corrugation depth of longitudinal direction in range 0.3 - 1.0. EFFECT: improved bending rigidity of envelopes along two mutually normal axes, lowered mass of envelope. 2 dwg
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