词汇	shallow spherical shell
释义	shallow spherical shell 浅球壳
随便看	thread take-up spring thread take-up spring adjusting plate thread take-up spring regulator thread take-up spring regulator adjusting screw thread take-up spring regulator set screw thread take-up spring thread guard thread take-up tension lever thread take-up tension lever washer thread-taking-up mechanism thread tap thread tapper thread tapping thread template thread tension thread tension bracket thread tension compensator thread tension device thread tension disc thread tensioner thread tension gear thread tension guide disc thread tensioning device thread tensioning devices for sewing machines thread tensioning rod arrangement thread tension meter