JT/T 28.6-93 交通行业工人技术等级标准水上运输船舶冷藏工
JT/T 28.6-93 Technical grade standards for workers in the communications industr...
行业标准2023.07.19
JT/T 28.6-93 Technical grade standards for workers in the communications industr...
行业标准2023.07.19
JT/T 28.7-93 Technical grade standards for workers in the communications industr...
行业标准2023.07.19
JT/T 28.8-93 Technical grade standards for workers in the communications industr...
行业标准2023.07.19
JT/T 28.9-93 Technical grade standards for workers in the communications industr...
行业标准2023.07.19
JT/T 28.11-93 Technical grade standards for workers in the communications indust...
行业标准2023.07.19
JT/T 28.10-93 Technical grade standards for workers in the communications indust...
行业标准2023.07.19
JT/T 28.12-93 Technical grade standards for workers in the communications indust...
行业标准2023.07.19
JT/T 28.13-93 Technical grade standards for workers in the communications indust...
行业标准2023.07.19
JT/T 28.14-93 Technical grade standards for workers in the communications indust...
行业标准2023.07.19
JT/T 28.15-93 Technical grade standards for workers in the communications indust...
行业标准2023.07.19