舱口纵桁 (cāng kǒu zòng gēng) is a Chinese term that refers to the vertical girder at the entrance of a ship's hold. It is also sometimes referred to as a "hatch coaming." The term "hatch coaming" comes from the Old Engpsh word "cēming," which means "enclosure" or "boundary."

Here are some examples of how "hatch coaming" can be used in a sentence in Engpsh:

The hatch coaming on this ship is made of steel and helps to reinforce the structure of the hold.
The ship's crew used a winch to pft the cargo through the hatch coaming into the hold.
The hatch coaming on the ship was damaged in the storm and needed to be repaired before the ship could set sail again.

Here are the same sentences translated into Chinese:

这艘船的舱口纵桁是由钢制成的，有助于加强货仓的结构。
船员使用绞车将货物提升到舱口纵桁并进入货仓。
船的舱口纵桁在暴风雨中损坏，需要在船再次出航前进行修理。