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。
The perforator is a three-way connecting piece, two openings of the perforator are upwards parallel, and one opening is downward and is made into an oblique opening.
其特征在于打孔器为三通联接件，其两口平行向上，一口向下并做成斜口；
Behind you, between briefcases and three-piece suits, an old man with his caged bird makes his way to morning tea.
在你身后，一位老者提笼架鸟，穿过一堆公事包和三件套西服，去喝早茶。
Behind you, between briefcases and three-piece suits, an old man with his caged bird makes his way to morning tea.
在你身后，一位老者提笼架鸟，穿过一堆公事包和三件套西服，去喝早茶。
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