（4）粒子间固体桥（solid bridges）：固体桥（图4-35b）的形成机理可归纳 为：结晶析出，粘合剂固化，熔融物冷却固结，烧结和化学反应等。
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solid model of bridges 桥梁实体模型
·2,447,543篇论文数据，部分数据来源于NoteExpress
With sections of sand, solid rock and even worn-down bridges that drivers must inspect before crossing, the 200km road takes nearly 24 hours to drive.
BBC: Seven of the world��s riskiest roads
That includes bridges and roads, drinking water and wastewater pipelines, levees, power lines, solid waste systems, and a host of other things.
FORBES: 2012 is the Year America Must Get Serious About its Infrastructure
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