One hardness test shall be performed on each wetted surface cut with oxy-fuel or arc-air which is left unwelded on the finished part. 用含氧燃料或电弧气切削加工表面上的未焊接的湿表面，应作硬度试验。
The manufacturers should take the hardness test of the bomb as a means of quality control, and put it into the quality assurance system. 制造厂应将储气瓶硬度试验作为质量控制手段，制定储气瓶硬度质量控制标准，并将其纳入储气瓶质量保证体系中。
