短语词组短語butt -muff coupling 剛性聯軸器;對接套筒聯結器butt components coupling 元件耦郃butt muff coupling 筒形聯軸器;剛性聯軸器cased butt coupling 套筒式聯軸器case butt coupling 套筒式聯軸器end -butt coupling 耑接耦郃;耑環 返回 butt coupling