他也动来动去，从上下壳间的开口向外望。
He squirmed around and looked out through the opening between the shells.
厂房上下游边墙围岩对蜗壳层混凝土结构的水平链杆约束对结构动力特性影响较小；
The parallel chain constraint, which is imposed by the sidewall on the concrete structure of the volute layer, plays a relatively small role on the dynamic characteristics of the structure.
本文将反应堆压力壳的球顶盖、上下法兰、螺栓、筒体及双道O形环作为一个超静定系统进行了应力和变形分析。
The reactor pressure vessel composed of spherical top and lower heads, upper and lower flanges, bolts, cylinder and two O-rings, as a static indeterminate system has been studied.
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