古笛长18厘米，笛上的指孔依然可见。
The tube is 18 centimeters long, with finger holes still evident.
由一根一端封闭的纤细管子组成的高音木管乐器，侧边有按键和指孔，靠近封闭端有一个使气流进入的开口。
A high-pitched woodwind instrument consisting of a slender tube closed at one end with keys and finger holes on the side and an opening near the closed end across which the breath is blown.
那么风笛是怎样一种乐器呢？它由带指孔的簧管和皮制的风袋构成，风袋就像一个空气存储器，为簧管源源不断地提供气流。
A bagpipe consists of a reed pipe4 with finger holes and a leather bag which provides a reservoir of air for the pipe. There are many types of bagpipes.
这里的壁板指与系统介质接触的所有压力部件，包括封头、设备口、人孔及人孔盖板。
Shell as used herein shall mean all pressure holding parts of the vessel in contact with the service fluid, including heads, nozzles, manholes and manhole covers.
冲孔：指工件由普通冲床和模具加工孔的工艺过程。
Piercing: refer to artifacts from the ordinary hole punch and mold machining process.
汽车轮毂PCD值是指螺栓安装孔的中心连接而成的截面圆的直径。
The Wheel PCD is the diameter of the studs from the centre of the wheel.
汽车轮毂PCD值是指螺栓安装孔的中心连接而成的截面圆的直径。
The Wheel PCD is the diameter of the studs from the centre of the wheel.
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