主桅杆顶向下看去，在主桅杆桅楼，你可以看到穿过水手孔，和死眼。

Main mast top Looking down on the main mast top, you can see through the lubber hole, and the dead-eyes.

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主桅杆—滑翔机顶部的垂直立柱，悬挂负面张线索具和反曲线挂绳系统。

KINGPOST - vertical strut on top of glider that supports negative rigging and luff line systems.

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一种纵帆装置的航船，至少有二根桅杆，一根前桅，在靠近船的中部有一根主桅杆。

Nautical A fore-and-aft rigged sailing vessel with at least two masts, a foremast, and a mainmast stepped nearly amidships.

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