A brass instrument consisting of a long cylindrical tube bent upon itself twice , ending in a bell - shaped mouth , and having a movable u - shaped slide for producing different pitches 一种铜管乐器，由弯曲两次的长圆筒形金属管构成，尾部有喇叭形口，有一个可滑动的u形拉管，可发出不同音高的音。
( 4 ) the tubiform petal of p . suffruticosa andr . and paeonia lactiflora pall , is a special petal which only has been occurred in the highflower of pralification flower of the above two species . the petal is similar to corolla of some family of sympetalous dicotyledon in shape , however it has a more thin base and many different lobes in form and size （ 4 ）在对台阁花型的研究中新发现了一种特殊的花瓣一筒状花瓣，它具有筒状结构，外形类似于一些合瓣花类植物的花冠，但筒的基部更细，向上变粗，口部边缘变化较大，具形状和大小各异的裂片，有的呈喇叭形，有的呈钟形，筒内壁上有时具一顶部游离的芒状物。
