stem tube meaning in English

带扩口的中空管

The characteristics and requitements of the seal of vessel stem tube shaft is introduced and structural form and actual effect of packing seal of vessel stem tube shaft is analyzed , based on comparison , test and screening of seal packing materials , two braiding forms of synthetic fiber compounded packing arc adopted and are tested in real vessels , and good sealing effect is obtained
摘要介绍了舰船艉轴密封的特点和要求，分析了舰船艉轴填料密封的结构形式和实效，在比较、试验和筛选密封填料材料的基础上，采用了两种编织形式的合成纤维复合填料，并通过实船试验，取得了良好的密封效果。