镀锌钢管生产工艺中，为保证产品质量，防止运输过程中产品生锈，需对钢管进行表面喷漆保护处理。
The pipe shall be protected with surface paint to prevent pipe rust during transportation for ensuring the quality of pipe during galvanized pipe production process.
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.
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