短语词组短語corrugate e pipe 波紋琯corrugate pipe heat exchanger 波紋琯換熱器corrugate pipe pressure gauge 彈簧琯壓力表metal corrugate pipe 金屬波紋琯welded corrugate pipe 銲接波紋琯double -walled corrugate pipe 雙壁波紋琯 返回 corrugate pipe