Home / Standards / GB/T 39656-2020 GB/T 39656-2020 Active Technical requirements for dredging system design of self-propelled trailing suction hopper dredger 自航耙吸挖泥船疏浚系统设计技术要求 Standard Type GBT ICS 47.020.01 CCS U34 Status 现行 Issue Date 2020-12-14 Implementation 2021-07-01 Responsible Dept 交通运输部 Drafting Unit N/A