2940 kW全回转拖轮主机曲轴轴瓦烧坏故障分析及修复工艺
2940 kW전회전타륜주궤곡축축와소배고장분석급수복공예
Malfunction Analysis & Repair Technology of Engine Crankshaft Bearing for 2 940 kW Azimuth Thruster Tugboat