cleanout cover

• 人孔盖

cleanout cover的用法和样例：

例句

1. Please move the manhole cover away.
   请将人孔盖移开。
2. The pollen grains patterns of germination apertures of P. ternata was likely to have colpate cover.
   半夏花粉粒可能为有孔盖萌发孔类型。

词汇搭配

• clean out 把 ... 打扫干净...