JT/T 30.8-93 交通行业工人技术等级标准航道疏浚船闸机械运行工
JT/T 30.8-93 Technical grade standards for workers in the communcations industry...
行业标准2023.07.18
JT/T 30.8-93 Technical grade standards for workers in the communcations industry...
行业标准2023.07.18
JT/T 30.9-93 Technical grade standards for workers in the communications industr...
行业标准2023.07.18
JT/T 30.10-93 Technical grade standards for workers in the communications indust...
行业标准2023.07.18
JT/T 30.11-93 Techntcal grade standards for workers in the communleatlons indust...
行业标准2023.07.18
JT/T 30.12-93 Technical grade standards for workers in the communications indust...
行业标准2023.07.18
JT/T 30.13-93 Technieal grnde standards for workers in the communieations indust...
行业标准2023.07.18
JT/T 30.14-93 Technical grade standards for workers in the communications indust...
行业标准2023.07.18
JT/T 30.15-93 Technical grade standards for workers in the commuanications indus...
行业标准2023.07.18
JT/T 30.16-93 Technical grade standards for workers in the communications indust...
行业标准2023.07.18
JT/T 31.1-93 Technical grade standards for workers in the communieations industr...
行业标准2023.07.18