cold-worked bar(If cold-worked bar is used for the manufacture of sockets all effects of cold working shall be removed. 如果使用冷加工棒材制造管接头，则棒材所有的冷加工效应都必须予以消除。)
work-hardening after cold rolling(In order to eliminate work-hardening after cold rolling, heat-treatment by annealing is frequently applied. 常常采用退火热处理来消除冷轧加工硬化。)
