JT/T 185.4-2002 Technical requirement for repairing special equipment of trailing hopper suction dre...
JT交通运输标准
JT交通运输标准
JT交通运输标准
JT/T 185.4-2015 耙吸挖泥船专用设备修理技术要求第4部分:锥形泥门
JT/T 185.4-2015 Repairing technical requirement for special equipment of trailing suction hopper dre...