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Archive image from page 182 of Development of a spherical acrylic. Development of a spherical acrylic plastic pressure hull for hydrospace application . developmentofsph00stac Year: 1970 (a) Nonpolarized white light. (b) Circularly polarized white light. Figure B-2. Residual stress raiser in the form of a local trepanning and recasting operation performed on an excessively large air cavity formed at the interface between two successive pours of the PS-18 adhesive bonding the joints of the prototype 66-inch capsule. 179
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