butt type expansion installation
毛尔伸缩装置 Mauer expansion installation 对接式伸缩装置 butt type expansion installation 密封条三维伸缩装置 dimension expansion installation with sealing strip ..
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嵌固对接式伸缩装置耐久性明显优于其它类型伸缩装置，是因为其设计相对比较合理。
It is more rational of retractor device of built-in butted bridge, durability is obviously superior to the expansion joint of other types.
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