“塞缝”造句

[建筑学]拱顶石:位于拱顶的塞缝石.
Architecture The keystone in the crown of an arch.

用防水原料填塞缝隙或塞缝片一年也能节省一千七百磅.
Caulking and weather - stripping can save another 1,700 pounds per year.

• #塞缝