steel running surface的意思|示意

The cylinder piston rod is made of carbon steel and is provided with a surface coating to improve the running characteristics and to prevent corrosion.

该汽缸活塞杆由碳钢制成，外著一层防护涂层，以增强其运转性能并使其具有防腐功能。

After running for 30 years, carbonization, cracks and corrosion of steel have occurred on the surface of the concrete of Sanhe navigation lock which was built in 1970.

三河船闸建于1970年，经过三十多年的运行，混凝土表面出现碳化、裂缝和钢筋外露锈蚀。