joint spacer
... adjusting spacer 调整间隔器 seal spacer 密封垫片 joint spacer 连接隔片 ; 连缝隔片 ...
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结合对考虑拼接缝的既有隧道管片受力状态的分析，找到裂缝隔片产生在连接块上的重要内在原因。
Combined with the analysis of original stress state of existing tunnel considering segment joints, the important internal causes of crack are found out.
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