n.孪生管；双联管

Narcissus Twin tube washing machine Series 水仙双桶洗衣机系列

Shock Absorbers: Twin tube gas-pressurized 双管式瓦斯气压避震器

The twin brothers are far apart in character. 那两个孪生兄弟的性格相差很远。

STUDY ON DYNAMIC CHARACTERISTICS OF A TWIN TUBE MAGNETO-RHEOLOGICAL DAMPER 双筒磁流变阻尼器动力学特性研究

You must be muddling me up with my twin brother. 你一定是把我看成我的孪生兄弟了。