短語詞組短語expansion device piece 伸縮管節(jié)expansion n piece 伸縮器flexible expansion piece 撓性膨脹節(jié)ible expansion piece 撓性膨脹節(jié)bellows expansion piece 波紋管膨脹接頭flexible brake expansion piece 撓性膨脹節(jié) 返回 expansion piece