SIS SS 78 09 41-1980 Shipbuilding Rudders Bearings and couplings for semi-spade rudders《造船 方向舵 半铲型舵的轴承和联轴器》.pdf

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SIS SS 78 09 41-1982 Shipbuilding Rudders Bearings and couplings for semi-spade rudders《造船 方向舵 半铲型舵的轴承和联轴器》.pdf

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