Both ends of the three-tiered water collecting branch pipe respectively communicate with the corresponding three-tiered horizontal water collecting pipe on both sides.

三层集水支管的两端分别与两侧相应的三层水平集水管相连通。

youdao

A three-way piece which causes the main ear piece, the auxiliary ear piece and the chest piece to communicate is connected in the bottom rubber pipe of the stethoscope for teaching.

该示教听诊器在下胶管中都接有一个将主、副耳件及胸件接通的三通接头。

youdao

As it turned out, authorities' decision to rely on every tool at their disposal was a wise one: Dykes had planted an explosive device in a ventilation pipe he'd told negotiators to use to communicate with him on his property in the rural Alabama community of Midland City, and also placed another explosive device inside the bunker, the FBI said in a statement late Tuesday.

WSJ: Military tactics, arms, helped rescue Ala. hostage