In our country bridge technical standards and engineering quality test evaluation standards, bridge expansion device hasn't be stipulated specifically.
我国桥梁技术规范及工程质量检验评定标准中，对桥梁伸缩装置未作具体技术指标规定。
In our country bridge technical standards and engineering quality test evaluation standards, bridge expansion device hasn't be stipulated specifically.
我国桥梁技术规范及工程质量检验评定标准中，对桥梁伸缩装置未作具体技术指标规定。
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