發送短信 : Gravity pipe flow of polymeric bulk solids in pneumatic conveying system

  _____    __   __  __    __     ___      _____   
 /  ___||  \ \\/ // \ \\ / //   / _ \\   / ____|| 
| // __     \ ` //   \ \/ //   / //\ \\ / //---`' 
| \\_\ ||    | ||     \  //   |  ___  ||\ \\___   
 \____//     |_||      \//    |_||  |_|| \_____|| 
  `---`      `-`'       `     `-`   `-`   `----`