大桥、高架、港口机械长期处于户外日晒雨淋，它们均极易生锈，很快就会发生锈蚀现象，大幅降低了安全系数。
Bridge, the viaduct and Port Machinery are all outdoors under the sun and the rain, so they were prone to rust and corrosion which will seriously reduce the safety factor.
为防止汽车制造过程中使用的机械设备及工具发生锈蚀，必须对其采取适当的防护措施。
In order to prevent rust corrosion of machine equipment and tool in automobile manufacture, some proper protection measures must be taken.
金属管道在含水量大、化学成份复杂的近海软土中易发生锈蚀。
Soft soil in the offing with high moisture capacity and complex chemical composition will rust the metal pipeline.
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