three-way piece

a three-piece suit (= a set of clothes consisting of trousers/pants, a jacket and a waistcoat/vest )

三件式套服（包括裤子、上衣和背心）

...a three-piece suite.

三件套家具

(British English)a three-piece suite (= a set of three pieces of furniture, usually a sofa and two armchairs )

三件一套的家具（通常为一张长沙发和两张单人沙发）

Today, as usual, he was wearing a three-piece suit

像往常一样，他今天穿的是三件套。

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。

(British English)a three-piece suite with two armchairs and a sofa

由两张单人沙发和一张长沙发组成的三件套家具

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；