车拦板的管状加高部分

tubular cage extension

产卵器管状结构，通常隐蔽的但有时延伸出腹部外部，雌性虫子用以放置蛋或卵

A tubular structure, usually concealed but sometimes extending outside the abdomen, with which many female insects deposit eggs.

文丘里管汽化器空气通道中的一段喉管，导致压力减小从而把燃料的蒸气抽出汽化器的碗状部分

A constricted throat in the air passage of a carburetor, causing a reduction in pressure that results in fuel vapor being drawn out of the carburetor bowl.