protected against corrosion的意思|示意

These housings (series p) are produced from cold rolled sheet steel and are protected against corrosion by a yellow chromate surface treatment.

这些轴承座(系列p)用冷轧钢板制造，表面经过黄色镀铬处理，以防腐蚀。

3the launching appliance shall be efficiently protected against corrosion and be so constructed as to prevent incendive friction or impact sparking during the launching of the survival craft.

3下水装置须予有效地保护以防腐蚀，而其建造须能防止在救生艇筏下水时发生磨擦起火或产生碰撞火花。

Spoke type load cell Senior alloy steel High accuracy High stability Low profile Easy to install Protected against corrosion by nickelplated treatment Suitable for testing machine, dynamomete, etc.

轮辐式传感器； 优质合金钢材质； 高精度； 高稳定性； 低外形； 安装简便、快速； 表层镀镍防腐处理； 适用于试验机、汽车衡和大型料斗秤等。