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Archive image from page 85 of Development of a spherical acrylic. Development of a spherical acrylic plastic pressure hull for hydrospace application . developmentofsph00stac Year: 1970 note that the edges of the drilled out cavity are lined with many fine cracks even after filling of the cavity with adhesive Figure 53. Results of a local trepanning operation in the joint of the 66-inch- diameter capsule. 82
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