使用预制钢筋混凝土梁或者现浇钢筋混凝土板会很容易将两侧地下连续墙的跨度空间连接起来，从而完成隧道的主壳。
The span between two such diaphragm walls can easily be bridged with precast reinforced concrete beams or a cast in-site reinforced concrete slab to complete the main shell of the tunnel.
在积木拼块中，至少包括一种是多边形柱体拼 块，该拼块的每一侧边上设有可与主壳体凸棱相楔合凹槽，或设有可与主壳 体凹槽相楔合的凸棱。
At least one kind of building block is polygon prism blocks which have grooves to fit for the protrusive arris or have grooves to fit for protrusive arris on the main shell body.
之后，在15日周二的清晨，有报告称建筑物内可能发生了爆炸，位于主安全壳基座的环状体遭到了破坏。
After that, in the early morning of Tuesday 15th, there were reports of possible explosions within the building and damage to the doughnut at the base of the primary containment.
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