中山市TBT预警防控平台
——技术性贸易措施资源
对外层作业或在沙子, 砾石, 表层石头, 表层粘土, 胶体磷酸盐和表层石灰石矿作业的矿工的培训和再培训
时间: 2018-06-14
2017-07-01
30 CFR 46
Training and retraining of miners engaged in shell dredging or employed at sand, gravel, surface stone, surface clay, colloidal phosphate, or surface limestone mines.
2018-07-11