活顶盖的英文：
removable hatch cover

removable是什么意思：
a. 可移去的,抽取式的,可移动的

removable bridge
可移动齿桥

He was removed from office.
他被免职了。

Automatic Small Scratch Removal
自动去除小擦痕

hatch是什么意思：
v. 孵化，破壳；秘密策划
n. 舱口；舱门

Three of the chickens hatched today.
今天有三只小鸡出壳。

Chicks are hatching from the eggs.
小鸡正从蛋壳里孵出来。

After the young hatch, the male departs.
当幼崽孵化后，雄性会离开。

cover是什么意思：
v. 遮盖；掩饰；包含；采访；给...保险；顶替
n.. 遮盖物；封面；掩护；保险；借口；餐具

Cover as if with a shroud.
仿佛用覆盖物掩饰着。

To be covered with or as if with fog.
为雾笼罩被或好象被烟雾掩盖

Covering: The fixing of a book cover to the spine and end papers .
上书皮:把书皮粘贴于书和纸上。