GB/T 39656-2020自航耙吸挖泥船疏浚系统设计技术要求标准
英文:Technical requirements for dredging system design of self-propelled trailing suction hopper dredger GB/T 39656-2020介绍...
英文:Technical requirements for dredging system design of self-propelled trailing suction hopper dredger GB/T 39656-2020介绍...