JT/T 31.3-93 Technical grade standards for workers in the communications industry-Salvage-Salvage workers. 1主题内容与适用范围 JT/T 31.3规定了海上救捞工的等级、应知、应会和工作实例。

JT/T 31.4-93 Technical grade standards for workers in the communications industry-Salvage-Heads of salvage workers. 1主题内容 与适用范围 JT/T 31.4规定了海上教捞工程的船舶救

JT/T 30.9-93 Technical grade standards for workers in the communications industry-Waterway dredging-The electric operative workers of the locks. 1主题内容

JT/T 30.10-93 Technical grade standards for workers in the communications industry-Waterway dredging-Narigation lock workers. 1主题内容 与适用范围 JT/T 30.10规定

JT/T 30.11-93 Techntcal grade standards for workers in the communleatlons industry-Waterway dredging-Capstain workers. 1主题内容 与适用范围 JT/T 30.11规定了绞滩工的等级

JT/T 30.12-93 Technical grade standards for workers in the communications industry-Waterway dredging-Signal direct workers. 1主题内容 与适用范围 JT/T 30.12规定了航

JT/T 30.13-93 Technieal grnde standards for workers in the communieations industry-Waterway dredging-Binding of rafts workers. 1主题内容与适用范围 JT/T 30.13规定

JT/T 30.14-93 Technical grade standards for workers in the communications industry-Waterway dredging-Sinking of rafts and riprap workers. 1主题内容 与适用范围

JT/T 30.4-93 Technical grade standards for workers in the communications industry-Waterway dredging-Waterway divers. 1主题内容与适用范围. JT/T 30.4规定了航道潜水工的等级、

JT/T 30.5-93 Techniceal grade standards for workers in the communications industry-Waterway dredging- Waterway drllrs. 1主题内容 与适用范围 JT/T 30.5规定了航道钻探工的等