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(右图)美国航天飞机上固体助推器连接接缝新(图左)旧(图右)设计的比较,在新设计中增加了第三个○形密封圈(详见本刊第4期报道)。
(Pictured right) Comparison of new (pictured left) and new (pictured right) designs of the solid booster connecting seams on the US space shuttle adds a third o-ring seal to the new design (see Issue 4 Report).